How much fun did you guys have with Minecraft so far? Worth the 10 euros? Is the game suddenly less fun or more expensive once constant updates are brought it?
Oh wait, no. Notch could have just released Alpha as the finished version and, hell, it would still be fun, and it could even compete on the mainstream market if it had some real advertising power behind it.
In fact, he could have done that as well as raise the price to 15 euros. Nobody would have complained.
Now then, compare that to the situation with Minecraft right now.