Just FYI, there have been people trying to get onto MuseCube to run the Average Advert version of the Nigerian scam.
Regardless of the person approaching you, this is totally a waste of time. They act as if they want to use one of your images for an ad. Ultimately, if you get that far, they send a check. You're to cash it and forward part of the money to get "licensed" so the photo can be used. Oops. Turns out the check bounces and you're out the money you just sent along, plus bank fees.
Basic Nigerian scam, hidden in the "advertising offer."