After using it for a full day, I've came to the conclusion that it must be some sort of scam website with fake accounts. In fact, how is it possible that dozens and dozens of girls have checked out my profile and none of them have replied to my greetings!? I do not want to show off but I believe I'm a quite good looking guy too. This is just not possible. Also tried completing my profile at 100% and uploading many photos of me, but still no messages.
Conclusion: I do not know exactly how this site works but to me it looks fishy. Probably fake accounts to get you down with no replies and make you purchase the premium subscription.