3 accounts banned

From my device, when I connect to any server (via a link or through a map), the system first asks me to confirm my email, on the second attempt I get blocked for violating the terms of use.

Until this moment, I had never received warnings or blocks; one of the accounts was a participant in the parter program, and the other had a Nitro subscription for more than 2 years.

Am I the only one who encountered this?