When i was in the game server biz, (in the uk counter strike servers!)
I hired 2 servers, in each made 4 game servers. From experince i can say this only works if you hosting sells game servers, AND your server they play in is fast! And good popular maps!
But for personal hosting there is little chance.
Those type of users tend to be people between 12 - 20 and most don't have credit cards etc nor any need to make their own sites!
though some do like to have their own server, private or clan.
There are many sites which do offer free clan hosting and many do know about them!
Best of luck.