We reverse-look-up the referral logs of Stripe, Gumroad, Lemon Squeezy and other checkouts, count how many visits each website sends to its payment page every month, keep the ones growing without paid ads, and classify where their new users come from.
Last month (September 2026): how many visits from each site reached a checkout page.
Grouped by new-user source. Open any site for its data and analysis.