rFactor's great fun to play, but it'll never be a real sim like LFS. I bought it with that viewpoint and therefore am not disappointed. Sometimes LFS gets a bit much and I just want to play a "game". I bloody hate proper arcade games and I see rFactor as a happy medium... I can rag around in something fast with less frustration than LFS, but I at least have to work a bit to get it round the track. Of course... this gets boring after a while, so that's when I go back to LFS. Then when LFS starts to do my nut I switch to rFactor. Works well for me.

I don't know if this is possible. But you could make it so each download has a demo username locked to it which you can't change. That way in order to get a new demo ID you'd have to download the program again. This would surely discourage people because they'd have to download a fairly big file every time.