I believe that 99.99% of all Firebase users will get their accounts locked, it’s just a matter of time. I have about 5 personal accounts, all of my accounts get “suspicious activity” after about a while of use.
true but why are they doing this
We’ll never know… 
I saw, that firebase has trouble on itself.
You can check it on Status Page! But i tried to contact the support, actually i‘m waiting for the answer.
They are all gone, I didnt see a post sent by admins, in these days