I pass on almost every "slower shipping" offer they make. In principle, I'm not opposed, but they just don't offer me discounts on anything I'm ever gonna use. I'm not planning on using Prime Pantry or Amazon Fresh (and spending a monthly fee on it) when I have a 24/7 supermarket that's less than a five minute walk from my apartment. I don't buy shoes frequently enough (or even from Amazon at all) to be enticed by the discount on shoes that they offered me recently. Even the digital credits aren't really that exciting to me - although I can stream video from Amazon, and maybe this is just an issue with my devices rather than the service itself, but I find that Amazon's streaming video looks and sounds inferior on my setup compared to iTunes and Vudu. About the only thing of value Amazon could offer me is discounts to apply to the items I already purchase (namely, discs), and I understand the margin on those is so tight that that's not something they're likely to want to do.