This is an awesome site :)
Think of Ebates as a local mall with over 1,200 different stores but with one huge difference. Online stores pay Ebates a commission (think of it as a finders' fee) on every sale and they split this amount with the consumer. Each store pays a different commission so users will save different amounts at different stores; users just have to look at the percentage next to the store name to see how much they will save.
Why not? It's 100% Free to Sign Up!