I do, as I imagine others do too, send a few messages to services/gambling sites offering my service as a Campaign Manager and asking them if they'd like to give it a go here at the forum.
You're sending unsolicited messages advertising your service to people. That counts as PM ad spam in my opinion.
That's all I wanted to know. Then I won't do that anymore and I'll accept the ban, just never knew it is all. Thank you DarkStar_.