Online dating stats: 100 million users?

I was just told there are a probably a 100 million online dating users, so I decided to check it out. Based on some rough estimating, with 16 million match.com, 10 million at date.com, 12 million at Yahoo, 18 million at friendfinder, 10 million at true and american singles, and a whole variety or other services with millions of members, it would be very, very safe to say there are 100 million people using online dating. I would daresay, worldwide, there are probably 200 million using some sort of dating service, or more.