They'll never get to unicorn status with that attitude.
Heck, they have no moat! Anyone can just walk in, use their source code, and set up their own free chess site!
I'm sure this is all great for chess lovers and the game of chess as a whole, but what about all of the investors who will never have the thrill of a 10% IPO pop?
It just seems kind of selfish to make such an amazing site and then not try to cash in on all that value.