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Advocate opts in
Your customer connects their X account to YNSL with one click. They control exactly which posts get published, and they can revoke any time.
Your customers are already posting about products they love. YNSL turns that energy into instrumented growth. Authenticated advocate posts, automated Stripe rewards, attribution back to your funnel. Built by a former Google Ads engineer.
We're not selling yet. We're listening. Tell us how you currently turn customers into marketing.
윤슬 — the Korean word for the trembling shimmer of light on the surface of moving water.
We named the company after the moment a hidden thing becomes visible — but only to those looking the right way.
Jin LeeFormer Google Ads engineer · building YNSL
I'm Jin, a former Google Ads engineer. I started YNSL because the same pattern kept showing up in B2B: companies pour budget at strangers while their happiest customers do nothing, and customers who'd happily vouch for products they love have no clean way to do it. The plumbing to fix both already exists. It just hasn't been built right. I want to build it the right way. If you've felt either side of this, I want to hear about it.
Book 15 min with me →Three steps for a V0 we're testing with B2B growth leads. We don't have answers yet, just a hunch. Tell us where it breaks.
Your customer connects their X account to YNSL with one click. They control exactly which posts get published, and they can revoke any time.
YNSL publishes the FTC-compliant advocate post through X's official API. The returned tweet ID is your proof of publication, automatically logged for compliance.
A Stripe credit lands in your advocate's account with you. Tied to the tweet ID so it never double-pays, held for 7 days, clawed back if the post comes down.
YNSL helps growth leads turn the customers they already have into measurable, attributable marketing. We're building it small, slow, and aimed at the B2B teams that actually want it.
Real open questions, not pre-packaged objections. If you have a take on any of these, that's the call.
Pre-seeded with our current hypotheses from B2B founder conversations. Each entry gets replaced with a real growth-lead quote as more calls come in. Updated weekly.
Most B2B growth teams undervalue advocacy because they cannot measure it. They run referral programs (Refersion, Tolt, Stripe Atlas referrals) but treat them as second-class to paid. The instrumentation gap is the actual bottleneck.
The reward layer matters more than the publish layer. Growth leads have ways to nudge customers to post (manual asks, templated DMs). What they do not have is a clean way to pay them for verified posts. That gap is the wedge.