Was really tempted to buy 20 Dash buttons like I did last Prime day, but decided it's not worth the small risk some guy at Amazon takes offense to me "abusing" their promotion and ban my account or something.
Not a bad little loophole though, last time I did it spent $20 and got back $20 in digital credit (for making 20 individual orders, all shipped with no-rush shipping) and $100 in credits that could be spent on anything on Amazon, but only $5 per order. (So basically a sitewide $5 discount for the next few months until I'd used it up.) I cashed in the digital credit for $15 Paypal (bought a PSN code and sent it to the guy in exchange) and the little buttons make for a cool little toy once you rebind them with AutoNotification/Tasker to control the lights or whatever.