Added

It's a distribution platform for all sorts of games (Counter Strike is a notable example amongst others). So having Ryzom listed somewhere on Steam would help in the same way having it listed in the Ubuntu software center helped: more people see the game and potentially come to check it out.

Ontopic: Agreed, some work needs to be done, and the game needs to be exposed. Then again, the current owners seem to focus on keeping the game alive as a priority, with no risks taken.