They don't get paid for this. They can't. They aren't even taking donations, for fear of Nintendo shutting them down. The project started as a few hobbyist programmers reverting Falco to his Melee move-set, and over the course of a few years and thousands upon thousands of hours of time invested, the most the Project M Back Room has made from their work was tournament winnings. They are doing this for free,for a community they love.