Social media kickbacks are the norm. Lots of blogs in lots of industries generate money through referral fees. It’s already a huge underground economy and it has the potential to become even moreso with locally-focused social sites like Foursquare.
This thought-provoking article explores the world of referrals fees and how the social media world is shifting people’s expectations… and increasing the government’s vigilance in fair trade laws.
Social media kickbacks: Would Foursquare referrals be legal?