Right, looking at crowdsourcing (the main proofist site) was born out of my frustration that most copyediting comments are for simple mistakes that anyone could have caught. I want to make ours cheap enough that you can get 10-20 pairs of eyes per piece of text and without the usual wait.

This game is an experiment to make it free, and if we get mass, can get the desired level of matching. (In just one hour, we're already a hit with educators in math/science!)