Green Man Gaming is a company that sells steam games (and their own distributed games, ie through their own client like steam) on the cheap, often lower than steam + usually tons of coupons usable at any given time. (E.g. right now there is a 20% off coupon on the front page).
Here's a referral link of mine, if you click that and make an account and buy something worth more than 5 USD, you and I both get 5 USD credited to our accounts. You don't have to use the referral code, you can always just go to greenmangaming.com but there's no reason not to use my link unless you hate money
Oh, and like I said, they sell games that activate on steam and games you download through them - here's a list of the games they sell that activate on steam (they give you a link to put into steam)
That link also includes a bunch of coupon codes.
If a bunch of us buy from them, we could also submit a petition that they accept bitcoins
Who knows? NothinG could point out his sales volume to them, that might get some heads turning 
-Garrett