I totaled it up to about ~$100k. Not bad for a few days. I wonder how much of their total revenue this is.

2dboy had a strong viral marketing campaign for this game. It's the only game I have downloaded over 6 years or so. They have exploited social networks pretty well, and now they got first dips on the Radiohead scheme in the game industry. If they made a mil they're doing ok (for 4-5 guys?) but this will be hard to repeat, imo.