Kongregate just announced that a money system for the site is now available for use by players. The money, called Kreds, can be bought using paypal or a credit card. At the moment the only practical use for Kreds is to tip developers. This sounds like a good idea and it’s one that few, if any, sites have implemented before.
However, this is just the beginning of the ways Kongregate will use their new money system. Kongregate is already offering the ability to purchase Kongai cards, and soon will allow the purchase of other virtual items. As I mentioned previously, Kongregate has a couple multiplayer games under development that use Kongregate’s very own microtransactions system. The system will utilize Kreds as the means of purchasing in game content for those new and upcoming multiplayer games.