No one reading this forum can give you a concrete answer. The moderator is a volunteer and doesn't have access to the systems, and the staff doesn't read or respond to the forum (you can sometimes see the admin).

What we can tell you is the same as what's already in the thread the moderator recommended you read. It's most likely that your case is a false positive from some protection system trying to mitigate the waves of spambots that surged a few weeks ago.

Trying to contact support, explaining the situation, and requesting that they remove the restriction from your account seems to be the best option.