Update README.md

Author: tstromberg

README.md

@@ -8,9 +8,7 @@ Email notifications for ADVRider threads. Built for Cloud Run, written in Go.
 
 ADVRider's built-in notifications only email you once after your last visit. This keeps the conversation going by emailing every new post until you unsubscribe.
 
-## How it works
-
-Subscribe to any ADVRider thread and get emails when new posts appear.
+## Features
 
 - **Respectful polling:** Adaptive intervals from ~10 minutes (active threads) to 4 hours using exponential backoff. Minimum poll time is defined as `5min × 2^(hours_since_post / 3)`, with a 10-minute polling loop; shared fetch for all subscribers to minimize load.
 - **User limits:** Maximum 20 threads per email address. Notifications batch up to 10 posts to prevent spam.