There are probably other folks work on the game. Just because Notch is the only person known now. Notch is marketable. Ergo, Notch is the noteworthy name that well, notch can apply to it.
And the pricing model worked well for his previous game. He got stupid rich during Minecraft, but no one was really decreeing the pricing model then.
And why shouldn't he do the same price scheme? What pricing scheme is acceptable?
Noone decried the Minecraft pricing model because he hadn't yet advertised features that he couldn't be bothered putting in the game. He also hadn't kept hiking the price up as he slowed down on adding features/fixing bugs. I wish he'd just finish the game then charge for it, rather than do the bare minimum, get the money coming in, and then have no incentive to finish anything.
And yeah he didn't specifically say "i'm going to be the only one on this game" it's pretty clear that this is going to be his new pet project, and he wants to run the development like Minecraft, which means it's basically
his game, and his game alone. As I said in the other thread this is kind of a problem because Notch doesn't seem to finish what he starts, gets bored and stops working on things half way through. Hopefully he'll get someone else to finish stuff for him with this game, but when you're adding new features each week and abandoning old ones the game tends to end up unfocused and a bit of a mess.
A couple points of clarification.
1) Not a billion dollar company, they have made $80 million over the life of Mojang.
2) The pricing model makes good sense in order to stay profitable and not risk backlash from the community by gouging now that they are successful.
3) Nowhere was it stated that he will be working on it alone.
Ok my bad on the company worth, but it doesn't really change the fact that it's no longer a single dev studio with "indie charm" as a defense for things you'd expect from a single dev studio. The pricing model makes sense in order to stay profitable, because he can throw out a tech demo instead of a game and get paid for it with no real incentive to actually make a game. I don't think it's completely outside the realm of reason to suggest he make the game, flesh it out, make it fun to play, then start asking for money for it?