There's only 1.9 million samples in their database, and to be fair, the people who go to that site to test their fingerprint, are probably the kind of user who

There's only 1.9 million samples in their database, and to be fair, the people who go to that site to test their fingerprint, are probably the kind of user who is going to have a unique fingerprint, notsomuch a common user. So a common user going there is likely a bit unique.