Yes probably I was a bit too fundamentalist, when writing the last comment. I am sorry for offending. Maby read a lot of FSF-philosophy articles just the same day. But it is true, that there are a lot of good companies dedicated to some idea, which just did not have the chance to learn, that they could deliver their services through free software too. Defnitly chessdotcom does actually a lot to promote chess. And that is a good goal on its own.