Dirtywave have shipped plenty of M8's in the last year. They just produce them in batches, there have also been shortages of the Teensy 4.1 microcontroller used IIRC and they are highly sought after. You can also "build your own" from supplied firmware https://github.com/Dirtywave/M8HeadlessFirmware

This is not the fly-by-night kickstarter you are implying.