> For higher-end board that seems likely. For cheap hobby-grade boards just the job fee[1] is more than 10 boards delivered is from JLCPCB.

Just checked myself using a board I already had manufactured, and can confirm it's a lot higher than JLCPCB or PCBWay.

Maybe for rapid prototyping it is okay, but at scale, to make one board is more than the entire selling point of the whole device.