This thread kind of exists as it does based on the fact that people were assuming there was something clever and software related that lead to the information because that's what the sales guy thinks, but the incomplete information we have from the developers suggests that they simply had a second photo that probably had some kind of identifiable information in it like her name that they saw via ZOOM,ENHANCE and a bit of Google which anyone could have done, even the sales guy.

FWIW, as others have pointed out, I do find this a bit creepy too, on two levels. First, the initial bet is a bit creepy. Guy involved said girl laughed it off, but that doesn't necessarily mean she didn't find it creepy that some guy she recently met was betting other people they couldn't track her down Enemy of the State style. And then on top of that, inviting the entire Internet into the game via the second obscured photo adds a much bigger layer of creep on to it, especially since in the process a lot of secondary information on her was leaked. Probably enough along with the photo of her face missing for others to find her, and you've kind of made that a public challenge indirectly. (Not one I have any interest in pursuing because like I said, the whole thing seems a bit creepy to me).