Uh?! Interesting?! I didn't even know @runicar! I did delegate some SP yesterday or the day before from the @altrosa account, so maybe this is their way of rewarding me for that?
What I understand so far is it doesn't cost you 'per click', but you post through their dedicated dclick editor, so maybe they take some beneficiary rewards. @dclick, could you hop in here and point us to the info? :-)
Oh yea, that's probably how it get on there.
It would be nice if @dclick filled us in with further info on this.