yes, the latest was rather about unsolicited forum private messages, but there are several ways a spammer can use to advertize (with certain URLs):
- Forum Accounts with zero posts but with certain keywords/interests
- Forum Signatures
- New forum threads (spammers try to post in various sub forums)
- Posts in threads which have nothing to do with the topic (ie, those recent hello new user)
- Private Messages (PMs) on the forum
- Site Account Profiles/blog posts
