Google Firebase Cloud Messaging offers spam tier for some – no account required, just knowledge of bad security

All that's necessary is willingness to abuse server keys exposed in apps and some technical know-how

Ten days ago, Abhishek Dharani, a Bengaluru, India-based bug hunter who goes by the name Abss online, recounted how he received a reward from Google for reporting a vulnerability in Google's Firebase Cloud Messaging (FCM) service.…

via The Register - Data Centre: Cloud
https://go.theregister.com/feed/www.theregister.com/2020/08/28/google_firebase_spam/