Its an interesting idea, I dont know if everyone can really benefit from it. But the concept of pinching very reasonable money amounts to pick on impulse gamer/buyers is a good one. Im sure I probably spent like thousands of dollars on itunes just cause i dont feel like hunting around for songs for free, and its just a dollar.. so it becomes worthwhile. Same with iphone apps etc.
This reminds me of the early days of mochi and ng api's where you were getting rediculous rates for it because not many people were in on it yet. It'll come back down to reality eventually so its all in the timing and the 6.50 will soon become more realistic as it plateau's out.
I doubt I'd ever buy an upgrade on anything, simply cause im not a hardcore gamer enough BUT if it was like a negligible amount like under a dollar, id be tempted.