Google Screenwise panel

http://www.google.com/landing/screenwisepanel/ -for downloading the google screenwise browser extension you get one of these: $5 Barnes and Noble Gift Card; $5 Papa John’s Gift Card; $5 Rixty Card; $5 Sephora Gift Card; $5 Walmart Gift Card; $5 Zappos.com Gift Card; $25 Expedia Hotel Card; $25 Grocery Savings Program Membership; Child ID Kit; or Magazine Subscription. You also get one of those gifts for every 3 months that you use it, it does track your internet usage though.