I can't see it working, dating sites aren't for people who get married quickly. They, as every site, need users stick for years, or LTV will be too low and not cover the UAC. So, it should be casual dating as in: 7000 contacts and 200 met in person over 12 years (me on mamba.ru). Users like me are definitely very profitable. Users who see 100 profiles, chat with 20, and get married and leave, aren't.