Amazon was effectively giving them away for free for a large portion of their lifespan. You'd have deals where you'd pay for them and then get a coupon for actually using them equal to the purchase price. I feel like I even remember a few times where the coupon you got worked out to slightly more than you paid for the button. Basically, saying that someone 'bought' one was usually only partially true.

They did have a few legitimately good uses. Had to have something that needed restocking sporadically but you also didn't think about often and could wait 2-3 days to receive when you realized you were out. A lot of prerequisites there, I used the ones for trash bags and detergent often.

It's mostly just a shame the amount of ewaste produced at this point. I still have a box full somewhere in hopes of finding a use case.

By "everybody" you mean everybody except Amazon. And I had fun hacking those. They were often on sale for like 2 bucks and they came with a battery that was good for like a thousand presses. You had to start the online setup process but not select any products, listen for the button's msg to Amazon which contained a unique ID. You could then have your own server listen for a "pressed" signal from that button and do whatever you want. I keep meaning to find out if there's still a way to initialize brand new ones.

What's the deal with these buttons?