I don't think that we would be able to have a mod there every round and therefore it would make the server a good rotation of gravity-free and having actual gravity. If we place a few mods there for certain times of the day, then we get different times of the day where it could be lower gravity. It makes everything more interesting because you have to wonder whether or not the server is going to be the way you want it.
I do think that it will attract more people. Lately I have seen more and more people on the TDM server. Adding a rotation of low gravity, in my opinion would not hurt the number of people coming to the server. I think that it would stay the same if not increase some.