Wouldt it be great with some kind of mini competition with the agk?

Trigger the users to make some more games with it

And who knows? Tgc could find some gems to sell !

The prizes could be vouchers for your store that the winners could use to buy more tgc products.

Tgc could also make the contributions to be open source that other users can use to watch and learn on ?
When the competition is over then

Just some thoughts as iam having a blast with it

Edited..........
Found the ludum dare competition and iam to late

A better prize IMO would be to get your app published on all app stores and you receive all profits from said stores! That way it would help newcomers get onto the market and also be a big draw for contestants