I am an affiliate of the Friendfinder.com program. I earn around $70 a month from them. You earn $1 for every male and $2 for every female that signs up. People can sign up for free. To actually send people email you need to become a paying member. I have been with the program for a while and they never miss sending a cheque, so I am reluctant to try a different program. In all the time I have promoted their site, I have only had 1 female sign up!