stumbled across this:
http://www.computerandvideogames.com/314167/diablo-3-like-trading-may-arrive-in-starcraft-2/
Strangely somewhat precise corelation to
Bnet 2 MapMarket
I wouldnt mind supporting the developers of great maps, like DotA back in the days, or footy, or even crazy stuff like the upcoming "World of Starcraft" ^^
so i think it wouldnt be too bad.
and it was forseeable that activision would try to get a slice of that tasty cake