Fair enough! I hadn't thought of the possibility of the author providing free copies. That's cool, too. I was mostly thinking that, at least in the beginning, it would be a good idea to lower the bar for participation by choosing short games that can be downloaded for free. I know that I would not even think of participating if I had to buy and read a 100+ page book.
Regarding how to choose, I think voting should be fine. If people suggest several games first, and then people vote between those, we won't necessarily get "popular" games, I think.