A major concern for third party developers not meeting their profit margin is the fact that the number of units may not be what Sony intended -- in fact, the numbers of units is far, far less. We know that Sony is concentrating more on first-party titles for now and with this in mind, we've got a decent hypothesis. What if Sony knows they have too few units out right now for third parties to reel in profits, so they're keeping third parties at bay for now? It would explain why they're releasing mostly first party games -- it only "hurts" Sony. Not others. Yeah, it's pretty far-fetched, but it would be the "right" thing to do.