Not trying to be funny, but why not just ask them ?
The email addresses are:
If you explain to them that it`s for your studies, ask nicely, and don`t ask anything that`s commercially sensitive, I don`t see why they wouldn`t tell you about their advertising and affiliate programs.
Retail organisations (and these guys are more or less that) are generally quite willing to be friendly and helpful to members of the public. It`s in their own interest to show goodwill to potential customers.