These guys are scammers. There is no scientific approach to dating evidence on their site. Its filled with fake members. They also scam people into a one month period promising you can cancel within 14 days. When you try to cancel and delete membership it doesn't allow you to. They then automatically re bill you and at almost 10 x the amount of the initial months fee. Then still continue to bill and charge continued handling fees. If you don't pay, they block your account so you definitely continue to bill you. They do not make their terms clear and their site stinks.