This service claims to be able to locate users of the phone number. But they are careful to tell you that nothing may come up. If nothing comes up, you won't be charged. Not quite true. They get you to pay for an annual membership, which you find does nothing more than what a normal internet search could pull up. If you can't find anything that way, they won't. Ok, you really aren't charged for that one as you have a year's membership. But how great is that?
You are told that you could do a tracer report and won't be charged if nothing comes up. Same issue: Nothing comes up. However are you charged? You had to pay for a credit. Ok, credit is not charged but you have already paid for the credit to use the tracer report. So you were not charged for the usage but you sort of have this worthless credit. Ok, you could use an investigator report - but that's gonna cost you around $80. Same trick: Nothing found; no charge. Owe, but you are stuck with this worthless credit for an investigative report. Upside, they have your money for potential usage. Most likely you will not be able to take advantage of it and they are laughing all the way to the bank with your charged funds!