Rover estimated 20%+ of potential revenue was lost to off-platform bookings — relationships starting on Rover, completing elsewhere. I led design on two complementary initiatives: phone blocking and a Community Guidelines modal.
The design constraint: do not hurt booking rates. Keeping people in the product only matters if they can still book.
Phone blocking: any personal number shared before a booking was intercepted. App and web showed a modal; SMS masked the number with an automated explanation. The block lifted once a booking was confirmed between that pair.
Community Guidelines modal: reached users at critical moments, required an explicit "Got it" confirmation, and reappeared if dismissed by closing the app.
Booking rates stayed neutral across the marketplace — we didn't make it harder to book. In the high-risk segments, booking odds were 3.5% higher when both sides had seen Community Guidelines.