I agree with most of the users' points made here as they're either nicely positive or backed by reasonings. So I just wanted to let you know that someone had posted some time ago about this exact issue at a game media site saying that the Uber team has got some of the best-talented and/or skilled programmers in the world, and so therefore they would need to be paid accordingly for their work.

That and also the fact that the studio may also be wishing to receive further money to continue operating as usual a bit long after they release this new game. That crucial money could be partly used to fund additional content (probably to release for free within patches or as DLCs) and to develop a new expansion or a different franchise. So they may as well take as much money as they desire in order to remain independent.