Has anyone ever been banned from MaxBounty for no reason?

Greetings.

I was accepted into maxbounty a month ago and I've earned around 160 dollars since my acceptance. However, I just got an E-Mail from MaxBounty telling me my account got terminated for fraud. This came as a shock to me as really the only campaigns I've been moderately successful were Fiverr and Swagbucks chrome extension, campaigns that allow all kinds of clicks other than E-Mail. I have never used email marketing for those two campaigns and have followed all rules that I read.

Is this just a mistake or maxbounty just a big scam that I fell into?

they're legit but very strict

The real question is who has not been banned by them

If you are from restricted countries and you got approval somehow, then yes.

Did you make sure you didn’t promote a product or service through a specific channel that you weren’t supposed to? If you did then that’s probably why you were banned.