“Subscribe and save” is a scam.
They advertise that you will save 5% by using subscribe and save, but then the price of the item you are buying just happens to go up by 30% on the day they decide to use as the basis for your order, which is not the day you ordered it or the day they pulled it off the shelf. It will occasionally go back down to a normal-ish price, but there will also be random months where it goes up 50% or 100%. I’ve seen $15 case of paper towels go up to $45 some months.
Then they keep prodding you to add more items to get 10% off your entire subscribe and save. I added some items a few weeks ago, got the extra discount percentage, but when they priced my order a few weeks later, the cat food I’ve been getting from them at a pretty stable price suddenly went up in price by the exact amount the extra discount was saving me.
Amazon essentially took the “four square” concept that car dealers use to shift higher costs to an area of the transaction where you are less likely to notice it.
This is the photographic equivalent of Lewis Black’s “if it wasn’t for my horse, I wouldn’t have spent that year in college.”
It doesn’t make sense at first, but your brain has to rationalize it so it comes up with a plausible explanation. It doesn’t have the context to know if that’s the right explanation, so while you’re driving to work and going about your day it’s still trying to process this in the background, quietly pushing you toward an aneurism years later.