Get as many as you can while you can - they're the cheapest IoT buttons on the market currently
Can you "root" them to do your bidding?
Yes absolutely, the official AWS IoT button is 22GBP, I bought my dash buttons 99p each on Amazon and use them as regular IoT buttons (by monitoring network and catching when they do a curl request).
That sucks. Alexa may be a replacement for those who don’t mind surveillance in their homes, but the dash button was perfect for making sure the office kitchen never runs out of paper towels.