mhh, you don't need an open API, create a folder named AddOn on installation and create parts of your games UI on a basic level (like the guild store dialoge) if you not intend addons to produce by the community. If I need 15min per day now to do my guild store listings (plus the time it takes to produce my items to sell) it makes far more sense to me to work 1h more per month and buy 5.000.000 gold at mmoga. This WILL destroy basic party of the game.
however, let's wait for ZOS' answer
