I would give insane amounts of money to EA if they disabled Origin. I would also give insane money to VALVe if they gave me whatever they currently have of Episode Three. As far as donating, it would be:
Firefox
Steam Users Forum
Ace of Spades (a free game that could really use a professional forum and just plain income)
Quake Live
Then, for fun, I would make a totally impenetrable and unhackable way to save credit card information and transfer money over the internet. Yeah, I know that's really impossible, but so is having infinite money, so while we're fantasizing, let's go ALL the way, okay?
Then, I would find a totally stupid/wacky forum like /b/, upgrade their servers to withstand what was about to happen, buy out 4Chan, remove all moderators ... and give $100 to everyone who makes a post there. And keep giving them $100 for every post they make. The catch is though that you can't post anything less than 120 characters, it won't post if you have more than five misspelled words, can't have more than three of the same letters side by side (this and the one before that prevents "aaaaaaaaaaaa" and "atatatatatatatat" posts) and there would be a random word that will get you IP banned if your post contains it (only applicable to posts made while that word was chosen), and have that random word change every five minutes.
Then I would sit back and enjoy the total, utter madness.