I'd bet that if you talked to the Christians who use a site like Christian Mingle, they would say that they like it because it increases their chances of finding a partner who shares their values.
On the surface, there really isn't anything wrong with that. Beneath the surface, though, an assumption is being made: other Christians are more likely to share one Christian's values than non-Christians.
Join for free and take advantage of photo personals, free email, chat, forums and more. If you are interested in meeting other godless heathens, then this is the place for you.
Seriously though, it's nice to be on a site where everyone shares the same attitude about religion (or lack thereof). Atheist Dating Connexion Niche dating has exploded online, providing sites that are exclusively focused on one particular group of people (and the people who are interested in that group). Atheist Dating Service is designed specifically for the 'deity-free'.
I have a sneaking suspicion that this is not the case.
For example, I'd think that a liberal Christian would have more shared values with a liberal atheist than he or she would with an evangelical fundamentalist Christian. The problem with sites like this, whether they say "Christians only" or "Whites only" is that they operate on some questionable assumptions: Atheists Only But what about online dating sites for atheists.
What is your reaction to the idea of an online dating site exclusively for Christians?