Hi. I just rolled back the addition of spam links to two articles on Roguebasin. They were 5 days old.
The account Anjanasanford was apparently responsible for creating them, according to the diff histories.
I saw a spam link at the bottom of an article I was linking to, followed it back to the user account that created it, and observed that the account had been used to make two edits - so I went to look at the other and it was a spam link too.