Amazon’sis a great way to save on household and other items you use regularly. By signing up for scheduled deliveries of things like toilet paper, toothpaste, dishwasher pods and dog treats, you can get 5% off the regular prices — or 15% if your delivery includes at least five items.
And there’s the rub: What if you don’t really need five items every time? Maybe you’ve already got enough, say, dog treats for the month, but if you skip it, your 15% savings drops to 5%
Source CNET Internet News