How Last20 Reached 100 Sign Ups in 2 Weeks Post Launch.

They turned their own “stuck at 80%” problem into Last20, a marketplace where vibe coders can hire developers to finish the last 10–20% of a project. Validation came from Reddit communities, a two-week MVP, and a waitlist of 20–25 users. By seeding supply, covering part of the task cost, and engaging daily on Reddit, they drove 100 visitors per day with a 5–10% signup conversion rate.

Actionable Takeaways:

• Validate where your users already gather (for Last20, that was Reddit subreddits like r/saas, r/sideproject, and r/microsaas).
• Launch with a two-week MVP — simple task posting, claiming, and notifications are enough to test liquidity.
• Seed supply early so the first tasks get picked up fast, building trust.
• Use pricing hacks (like $1 tasks subsidized by the platform) to kickstart liquidity and the flywheel.
• Re-engage waitlist users with direct outreach and clear CTAs to post their first task.
• Track key conversion metrics with tools like PostHog to identify bottlenecks and measure traction.