Does Kickstarter take a percentage of those donations for their operating costs?
Believe so, yes.
I believe Kickstarter takes 3% and Amazon Payments takes another 4%. Or it might be the other way around but I believe a few people have said you lose 7% off the top.
And yeah, a project by 3D Realms, that was cancelled in 2009 due to lack of funding before a single ounce of gameplay was shown and they won't say who is developing it. That either means they don't actually have a developer yet or the one they do have is one known for making bad games. I'm sure ready to drop a pile of money on that. It's incredible to me that after the shit show that was Duke Nukem Forever, Broussard still sees himself as an industry superstar and that the 3D Realms brand is anything more than a punchline. Their chances of this succeeding would probably be a lot better if they'd just let that brand die and start things with a new name. But Broussard's ego won't allow that.