Thus creating a world where everybody struggles to look as poor as possible to Google's algorithms in the hopes of getting a good price?
I'll just google "how do i gets my babby daddy to give me his welfare check" ten times a day, and use a separate account when it comes time to research private yachts. Cha-ching!
Why would Google do this? There is no way it would not be discovered leading to a lot of ill will and little gain for Google. Plus I know of no current Google marketplace where they adjust cost based on user information.
I'm not sure if they'll put this into practice, but this sure gives them the ability to.