I don’t see any option to give money. So he does not accept donations from users like you and me and only asks for sponsorship?
An alternate website can be found here: linux.die.net/man/ However, I don’t know how much they differ.
Edit: What I don’t like with both of these sites is, that they are powered by Google. I would like to see an alternative engine, at least an option to set it up. That’s probably a reason why I never used it and actually wouldn’t want to support it.