Here is my 2 cents on this topic.... Don't go for it... It has happened to me many times before. 

You find that these profiles are not even sure of what they want. 

It becomes and endless inbox talk of how they would like to experience this or that with us...which is all well and good but come time to meet for coffee/drinks to intro each other......ESKOM!! No where to be seen and it becomes excuse after excuse.

So personally, I stick to those singles/couples that are specific and know what they want.