Whats Wrong with Smowtion ads?

hi,
I am using smowtion ads for quite some time. they pay on time and they have good service going on.
recently, i am seeing too many "free ads" such as sign up with smowtion or learn more about smowtion.
they are advertising on their own ads, so do publisher get paid for those ad spots?
i am also notice this problem on some other sites aswell!

See original post by rush4gold