[rojcyk]

When I was working at Kiwi.com as a senior product designer one of the guys on the development team did something very similar.

We were testing a new push notification refactoring and managed to send a push notification "Test test" to our whole Android user base (couple of hundred thousands of users). Interestingly enough, it was a great reactivation campaign. We bumped bookings by a noticeable margin, and since we redesigned our "rate us" flow couple of weeks before, we had a huge influx of 5* ratings as well.