Humble Bundle is a company I can personally vouch for. I've made many purchases on their site and never once ran into a problem with payment or the keys they send. If I ever send out a PSA about a sale or a company you can rest assured that I only promote entities I've personally conducted business with. A portion of your purchase can go to charity (recommended) or yourself (seriously...just don't...please). It's also a good idea to sign up for their newsletter so you'll get advance notification of upcoming bundles; you'll be able to jump in early when the prices are relatively low.
The Jumbo Bundles are the big highlight events, cramming 9 or more games into one bundle. You can pay roughly the average to get all the games in the bundle, or pay extra to get an additional game or some other perk. You pick which option works best for you. Here's how it works: for one game, you can name any price. For $7.00 you get the 6 games in one bundle, with mystery titles yet to be announced! Who knows what they are, but the excitement is killing me! For $10.00 you get the 6+ games PLUS a copy of Verdun. I skipped the extra game; it just isn't something I'd play. If the bundle is 12 games (which is highly probable), you're looking at $0.50 A GAME. I worked out the math and the retail price of only the known games right now, excluding the Verdun, is $119.94. If you pay the $7.00 option, that's a savings of $112.94! Since more titles are being added over the next few days you can expect your savings to be SUBSTANTIALLY higher than that! Strike as early as you can Always Late Gamers, because the price is only bound to go up from here. If you have questions or concerns, leave a comment below and I'll try my best to answer them. As always, happy gaming!