On what server? In chesscube I got games when I wanted.
I think live 960 in on roadmap of chess.com and given the size of site it should be lively enough
This is really not the place to advertise other sites this is why I did not mention any site name.
However if you mentioned a site I wonder - if it is not a secret - what your rating is over there ( I mean standard not tournament ) and at what time control you play. Since at certain ratings and time controls I see those triangles but somehow I can't get a game at my rating ( 1900+ ) and my time control ( 15 min ).
Of course you can't play Chess960 live here. You can play Chess960 correspondence which I did and enjoed it very much. I learned how to make a plan quickly if I see a Chess960 starting position. I would really like to play it in live but I can't. I can't play it here for the obvious reason but chess.com may know something about why not to implement this feature.
Since at an other site where I play which offers live Chess960 it is also very difficult to find a partner. The common pattern is when the opponents click on my open seek it takes for them 10 seconds to realize that something is wrong with the order of the pieces. They are very surprised ( despite the seek graph having a different symbol for Chess960 ) and quickly abort the game ( 9 out of 10 cases ).
Are they afraid or just trust their routine moves better? I simply don't understand why there is no curiosity in them to find out what they can achive in a theory free game where they have to make up their mind for themselves.