MAXIM L.

I was working with AdMob almost 8 years until Adsense terminated my account for invalid activity. There was no explanation of the reason. I've sent one appeal and after almost 1 month of silence the second, and both were rejected. I had not clicked on ads, and 7 years all was OK! No signs of trouble.
I want to believe that it was not a deliberate sanction for content that the company dislikes for other reasons.
The worst technical support of Adsense does not allow talking with any living human, only robots and links to common questions are presented.
I think Google became as Frankenstein, plays too much with machine learning and robots made them unstable and unreliable.

EDIT:
After one year after blocking I've send my 3rd appeal and it was having a success: Google was unlocked my AdSense account right in Christmas. After reviewing reasons I found that I have had missed a notification in the AdMob console about certain applications, all is working after little fixes.

P.S.
You should be VERY careful in complying terms and conditions and aware about all notifications you receive in all the corresponding consoles.