Because it's basically a giant middle finger to anyone who has already purchased earlier bundles that came with Samorost 2 and Machinarium. In that case you're paying $5 for one fairly short game, which isn't much of a deal anymore. Is it so much to ask the the Humble Bundles include, I don't know, new games so people don't have to pay for something they've already paid for?

Humble Bundle used to be "pay what you want," then it became "pay what you want, unless you want steam keys," and now it's "pay what you want, unless you want steam keys and this/these extra game(s)." You can go on all you want about other people acting entitled over cheap games, but you're ignoring the fact that the humble bundles are continuously becoming more and more oblivious to what they set out to do in the first place. The great thing about humble bundles was that even if you only had a dollar to spare, you could still spare that dollar get some great games for a cheap price, and you'd probably discover something you didn't even know about in the process. By including games that have already been bundled before and forcing you to pay a minimum to get another new game, you're saying to those people , "Fuck you." Why not make Somorost 2 and Machinarium the beat the average games? Because they know damn well that those two are just fillers that they've used again and again and people will pay more for a new game.

Long story short, it's no longer about providing people who can't spare that much money with some quality games, it's about selling games a that lot of people have already bought with a few new additions for as much as possible while still maintaining a "pay what you want" model so people can't complain just because you can still pay one cent. Which I think I'll do this time.

Actually, I'm not whining at all, I'm quite happy with the bundle. It's $5 for a game that was released today that had a preorder price of $10, plus two more games and the soundtracks. IMO, it's a great deal.
I just wanted to point out that you don't get all the games if you pay the bare minimum.

You are right. It's not a ripoff. But more like unfair if you own already 2 games from previous bundles like me. If all the games are new for you it's a good deal for 5$ (Most people are only interested in the steam keys). I would also like to point out (apart from the charity), they WILL make alot of money out of this release on Humble Bundle. Just because Hib his extremely popular. That's why I say it's a very big 1 game sale. You have to be realistic, and realise HiB is way past the "charity" and "pay-what-you-want" status. And that's why I'm a bit frustrated, cuz maybe their concept is already "dying"