Active Rain or Facebook? Which has better results?

I try to be as active as I can be on both by joining the appropriate groups etc.., but I was wondering from others, of the 2, which has brought you more business? Sure you have contacts, friends or associates...but has either network made you any money? I am contacting agents for business, but have any agents actually received referrals from either of these? Any what about Twitter? Is it worth getting involved in or is it much of the same?