Earlier quoted context omitted.
I would like to buy a smart scale because I think the data it provides would be really useful to me. So in my case the smart gimmick really is the feature I want. Unfortunately I price my weight data very differently than they do, so unless they pay me multiple tens of thousands of dollars I would not agree for it to send the data it collect. Unfortunately there is no such smart scale. So I would add to your list a 5…
https://github.com/oliexdev/openScale/wiki/Supported-scales-... (Not that it detracts from your point about the market).
It's funny how open source started as "the manufacturer is too lazy to support my use case" and now is becoming "the manufacturer is too greedy / cannot be trusted"