What is up with people joining sites like Pixies and then starting a new topic that are nothing but basically SPAM links to other sites?

Yesterday, there was a post in the Erotic story catagory that was a link to another site, and today there is another link very similar.

There is a golf forum that I am a member of, where new members are joining and listing Porn spam, and now we've got a similar issue.

Are there people that do nothing all day but go around joining forums such as Pixies, and entering spam links? Are they getting paid to do so? if so, where can I sign up, since I can use the money.

Lillith, I wish you and the other moderators luck in dealing with this potential problem.