This bunch of accounts is a multi account so easier adding them to misbehaving right as they register a new acc. They don't stop and I suspect that it is an automated posting — at least it is strange to publish something in wrong section from multiple accs again and again. And this one acc posted a new topic already as expected.
Yes, all of those accounts follow several common patterns. The account owner is careful not to violate certain rules so that the accounts are not penalized much more quickly. The admin said he had something in mind for multi accounts, let's wait and see what it is and how it works.