Tell HN: Bing's best feature: Cashback

I'm sure this is well known but I'd like to spread The word for people who haven't used this: Bing's cashback program is at times too good to be true. During august. All items from eBay were 25% off. Sometimes 30. I'm going to vote that we on HN post when there are discounts as good as these. After all, when isn't it good to save an extra couple of hundred bucks? Particularly for startups that can find basic supplies for even cheaper.