A traditional B2B funnel asks a stranger to fill a form, wait for a sales rep, and sit through a call — and it typically converts around 0.1–0.5%. I stopped running that. Instead I sell a small $29 product on Gumroad and let the purchase itself qualify the lead.
This post is the Apps Script that turns every Gumroad sale into a logged, license-verified lead with an AI-personalized follow-up email — no CRM, no Zapier, about 70 lines you can copy.
Why free lead magnets and demo forms both fail
A free download gets you emails from people who spent nothing, so they're not qualified. A demo form gets you almost nobody, because the friction is huge. A small paid "micro-commitment" sits in the middle: the buyer proved intent with their wallet, and you now have their email, the exact product they bought, and a valid license — everything you need to follow up with the right offer.
Gumroad handles the checkout. Google Sheets is the lead database. Apps Script is the glue: catch the sale, verify it's real, and send the next step.
