You sent over 100 PMs with the same format: clear unsolicited bulk PMs. 4 people reported it, making it unwanted & unsolicited bulk PMs = spam. Most others would've been banned much longer.
My bad. However, ...
Surely by definition, all PM's are
unsolicited.
The definition of 'bulk' is multiple recipients of the same message at once and on mass, which is not what I did either.
Still, your forum, your
rules.
But few guys you send message considered it as spam so they reported it which is the reason why you banned for 30 days.Sending bulk PMs are not problem until people don't think it is spam.