LinkedIn thought-leader ads case study: How Understory Agency ran RB2B's founder posts at roughly 20% CTR

Plenty of B2B companies have a founder whose LinkedIn posts land, and almost all of them leave that channel entirely organic. The posts reach the follower graph and whoever the algorithm decides to show them to, and the ceiling sits wherever that lands. Putting paid budget behind a person's own post is a different ad product from a company-page ad, and most marketing teams have never run it.

RB2B identifies the people visiting a company's website. Adam Robinson founded it and runs it as CEO. By the time he called Understory Agency, his organic LinkedIn presence was performing better than he had expected it to, and RB2B had real traction in email. The paid side of the business did not exist. Asked to describe the paid media situation before we started, he said there wasn't one.

So the question was narrow. Something was already working with no money behind it, and RB2B wanted to know whether money would make it work harder. We took that on in 2024 as a LinkedIn thought-leader ads programme, built entirely from posts Adam Robinson had already published.

The video creative ran at roughly 20% click-through, against the roughly 1% benchmark we work to on LinkedIn. Blended cost per free signup came in at roughly $22, against a category norm of $50 to $100. At 22 days in the programme had produced 98 click conversions, and the ads had collected 100+ comments.

Here is how we built it.

Performance Summary (2024 thought-leader ads programme)

• Click-through rate, video creative: roughly 20%, against the roughly 1% LinkedIn benchmark Understory Agency works to
• Blended cost per free signup: roughly $22, against a category norm of $50 to $100
• Cost per free signup, click-through only: roughly $57
• Click conversions: 98, at 22 days in
• Audience: roughly 41,000 people, at companies of 11 to 500 employees, in marketing and demand-generation titles
• Comments on the ads: 100+

About RB2B

Industry: Website visitor identification

RB2B (LinkedIn) tells a company which people visited its website and routes that into the CRM and workflow tools the go-to-market team already runs, including HubSpot and Salesforce. The company is based in Austin, Texas, and sells a free tier alongside its paid plans, which is why cost per free signup is the conversion metric on this page. Adam Robinson founded RB2B and runs it as CEO, and he now runs 3 companies in total, MoltSets, RB2B and Retention.com. Understory Agency built and ran RB2B's LinkedIn thought-leader ads programme in 2024.

The Challenge

Understory Agency inherited nothing at RB2B, because there was nothing to inherit. RB2B had no paid media running on LinkedIn or anywhere else. What it had was an organic LinkedIn presence its founder rated better than he had expected, and an email motion that was already producing.

That is a harder starting point than it sounds. A brand new paid account has no audience data, no creative history and no cost benchmark of its own, so the first month has to produce learning as well as leads. Thought-leader ads add a second constraint on top. The creative is a real person's post, so an agency cannot simply write better ads. The raw material has to already exist, and it has to already work.

The upside of that constraint is what made RB2B a good candidate. A founder with a feed that performs organically has, in effect, already run the creative test. We came in through a referral from a shared contact, and the brief from Adam Robinson was to find out which levers would speed the business up.

The numbers before we began

Understory Agency scopes every paid programme against what the account can already prove. In RB2B's case, the audit was short:

👉 No paid media programme at all, on LinkedIn or on any other channel

👉 Organic LinkedIn performing above expectation, in Adam Robinson's own assessment

👉 Email traction already established, with no paid channel running alongside it

👉 No paid audience data and no account history to build a first test on

👉 A category norm of $50 to $100 cost per free signup, with anything under $50 counted as good, which is the bar a new paid channel had to clear

The Strategy: Segment the founder's own posts, then buy the pairs that work

We opened on goals. Where to start, and where this could go if it worked. Then Adam Robinson sent over a document of his 25 best organic posts, and that document was the entire creative inventory for the programme. Understory Agency produced no new creative for the launch. The proof of concept already existed on his profile, and buying it was cheaper and faster than commissioning something untested.

The work was in the matching. We segmented his content into 4 personas, sales, founder, marketing and outbound agency, and came back with 3 to 9 suggested audiences to test against each of them. The addressable pool across the programme was roughly 41,000 people at companies of 11 to 500 employees, in marketing and demand-generation titles. Every post we promoted was first edited to carry a call to action, so the ad had somewhere to send the reader and something to price. We also promoted selected third-party posts, the ones written by other people about RB2B, because a recommendation from someone who does not work there carries a different kind of weight.

Then we bought the matrix at small budgets. Every post ran against every plausible audience with enough spend to read a signal and not enough to waste a month, and the thing we were looking for was the pair. A post that lands with the outbound-agency audience is not the same asset as a post that lands with heads of marketing, and until the matrix runs, nobody knows which is which. Once the winning post-audience pairs were clear, budget moved behind them and stayed there. The benchmarks we were reading against are the ones Understory Agency works to on LinkedIn: roughly 1% click-through as the baseline, and a category cost per free signup of $50 to $100.

The creative finding was the size of the gap. The video bucket ran at roughly 20% click-through, and the ads collected more than 100 comments, so the paid posts kept the conversation the organic ones had been generating. Blended cost per free signup settled at roughly $22, with click-through-only signups at roughly $57. At 22 days in, the programme had 98 click conversions against the roughly 41,000-person pool.

The operating model is worth stating because it is the part most founders assume will cost them their week. RB2B's total time commitment was 1 weekly update call. Adam Robinson makes the content, which he was making anyway, and Understory Agency handles strategy, implementation and execution on top of it. The scaling rule was set at the start, before any results were in: double the ad spend each month for as long as it kept making sense. That is the version of a scale decision that gets made calmly, because it was agreed while everyone was still looking at a blank account.

The Results (2024 thought-leader ads programme)

👉 Roughly 20% click-through rate on the video creative, against the roughly 1% LinkedIn benchmark Understory Agency works to

👉 Roughly $22 blended cost per free signup, against a category norm of $50 to $100, where under $50 counts as good

👉 Roughly $57 cost per free signup on click-through alone

👉 98 click conversions at 22 days in

👉 An addressable audience of roughly 41,000 people, at companies of 11 to 500 employees in marketing and demand-generation titles

👉 100+ comments on the ads, on creative that was originally written as organic posts

👉 RB2B asked to put more budget behind the best-performing personas, unprompted, on a review call

Key Takeaways

• Thought-leader ads have the shortest path to good creative in B2B, because the creative already exists. A founder with a working organic feed has run the test already, for free, in public. Start with the posts that earned attention on their own.
• Segment the content by persona before you build audiences. Map each post to the persona it actually speaks to, build several audiences per persona, then run the matrix at small budgets. What wins is a post-audience pair, and only the matrix finds it.
• Organic posts rarely carry a call to action, because they were written to be read. Edit one in before any spend goes behind the post, so there is a conversion point to price.
• Agree the scaling rule before the first result lands. Deciding in advance to double the budget monthly while the cost per conversion holds means the hard decision is already made when the data arrives, and nobody is negotiating it under pressure.

What RB2B says

Conclusion

RB2B started 2024 with no paid media of any kind and a founder whose LinkedIn posts were already outperforming his own expectations. Understory Agency turned that into a paid channel using 25 posts he had already written, 4 personas, and a matrix of audiences tested at small budgets until the winning pairs showed themselves. The video creative ran at roughly 20% click-through against the roughly 1% benchmark we work to. Blended cost per free signup landed at roughly $22, against a category norm of $50 to $100. The strongest signal came from RB2B's own team, who asked on a review call to spend more.

The precondition is worth naming, because Adam Robinson names it himself. Paid ads reward a company that can already find and close customers on a repeatable basis. Product-market fit and message-market fit both have to be there, and a higher average contract value improves the odds considerably. A company that is not there yet learns the same lessons more cheaply through outreach. A company that is there, and has a founder already posting, is leaving the cheapest creative inventory in B2B sitting unused.

Related reading

• Understory Agency paid media, the service line behind this engagement.
• 10 best LinkedIn ads agencies for B2B SaaS, the buyer's guide to this category.
• Best LinkedIn ghostwriting agencies for B2B SaaS, for the organic side of founder-led LinkedIn.
• RB2B, the website visitor identification platform.
• Forthcoming in the paid social cluster: Northbeam, Hyperbound and Vicarius.