Winzy's a free site where you can go and play free games and so on. So far, nothing very unusual. However, they do indeed have a twist to their site. If you register then when you use their search engine you'll be earning yourself entries into competitions. The prizes might be Amazon certificates, games consoles or even straight cash.
Hey, you're going to be using a search engine anyway, so why not get something for it?
They've also got their own games as well, for example a very good version of Deal or No Deal. It looks fun and vastly better than simply watching people on the TV, you can take part directly.
Worth checking out.