Several members have reported a recent member contacting them via PM, similar to the following quote. This is a clear violation of the site's "no commercial posts" and the site Guidelines; the sender has been banned. If you receive a similar request via PM, you can report it via the "Report personal message" (it looks like an exclamation point) and a moderator will handle it. Thanks.
I've been browsing through the forum and noticed you're an active user, who loves to talk and participate in debates. I value your knowledge in the niche and think that it could be helpful and we are able to build a useful collaboration with each other. The idea is to put an active link in your signature field leading to my homepage for a certain time on a rewarding basis. Let me know if you'll find it acceptable for you and we could discuss further details.