From what I hear it's straight up. It is basically like an escort service without actually meeting. She'll send photos, letters, phone calls, etc. Stuff that a girlfriend would normally do. Nothing that could ever be construed as illegal. It is basically just to prove to your relatives and stuff you have girlfriend, really. I can't see any other reason to use them. For the kinkier among you (you know who you are
), some do send you
gift (although it does depend on the girl obviously).