No problem. They do not do age/sex/etc... Without knowing who exactly the user is there is really no way to determine exact demographics of an individual user. However, using the IP to determine the city/state the person is coming from, you could combine that with other publicly available info to come up with a profile of individuals from that area, such as average income, is it a city or suburb, etc... Based on that information you can then tailor pricing or possible products towards a specific demographic. Not a 100% solution in all cases though.