If you sell on Gumroad and email through MailerLite, you've probably wrestled with CSV exports or manual handling. This fixes all of that. Every Gumroad sale flows into MailerLite within seconds — buyers added to the right groups, custom fields populated, refunds handled your way. Build smart rules like "VIP if amount > $100" or reward bundle buyers automatically. Test in dry-run, retry failures with one click. Setup takes 30 seconds.