The biggest IRL money are made by gamling.. many people destroyed their lives by gambling, loosing all they have. Who profits? Owner of casino.. I know personally few casino owners and they are making shitloads of money, just by other people playing on their machines.. we all know why  so looks like you want to run online site.. I would prefer online casino.. good idea anyways. .haha  and as mentioned earlier maybe muslim dating site? hmm I do not know anything about it, but it might be it.