I changed only the onboarding and paywall. Revenue jumped from $60 MRR to $300 in one week (i will not promote)

Six months ago I launched a mobile app for learning foreign words. For months I was just improving the product. Adding features, fixing bugs, polishing the UI. But revenue almost did not move. The app was stuck at around $60 MRR. Then I changed only two things: onboarding and paywall. I made onboarding more personal, let users try the main flow before payment, added a 3-day trial, and changed how the paywall works. After that, trial conversion grew from 2.5% to 5%. And the app made $300 in the last week alo