I hope that this is the right forum for this post. It does fall under the category of "Deals, Freebies, and Resources." I gave the list of other MobileRead forums a quick look-see, and didn't find a better place to put it . . . .
Kim Komando has compiled a list of 23 ways to get discounts on Prime.
Now, I know about the 50%-off deal that Amazon gives to college students--I keep getting the (large, starting-to-get-annoying) advertisements every time that I surf the Amazon website. For some reason, Komando doesn't even mention it.
Amazon started one of the following discounts last summer, so someone may have brought that up then. It is a (big) discount to MedicAid recipients; verification of that is by somehow letting Amazon see the EBT card, or something like that.
For information about the just-mentioned discount, navigate to
this link. For the rest of the discounts, follow the link on that page to them.