What cashback or rewards programs do you use, and what makes them worthwhile?
I used to cashback via a debit card, and used to love the Bing Cashback program. Now I'm participating in nothing. What's good right now, and which programs are not worth it? What programs are worth it even tho irritating? I shop a lot at Ebay, Amazon, Meritline. What about you? Do cashback programs change where you shop? (This thread is for general shopping, not airline miles, since those programs are complex enough to need their own thread.)