This is something that I've been doing without even paying attention to and I've already worked my way up to $48.52 for doing in my opinion... nothing, other than opening emails sent to my inbox.
There are other incentives to earn larger amounts for buying things from certain retailers. One of the sites is vistaprint, which I've used, as well as Netflix. They offer money for surveys too which for me were a waste of time but others might find it profitable.
I only participate in the things that interest me or are a quick increase in my earnings!
I just wanted to share this site with anyone who may or may not be into this and give my opinion on it. I check it out while I'm online doing all my other social networking stuff so it doesn't take up extra time. I think of it like a "Keep the Change" type savings that I'm actually kind of surprised by at this point!