TechIsCool parent
I am surprised that the use of a messaging queue through MQTT is considered a misuse of their technology when in reality it appears that the other application just was using an internal API that could change without notice. I also could see how certificate based authentication could be viewed by some as a time based expiration on the firmware.
Yeah that's a huge bummer if so, I've got both a HA automation that shows the printer status without needing to have an app installed and I've got a secondary filtration system that's fully automated which would be a PITA if I had to manage manually.
Totally understand if it's something that could change/break in future updates but the language about it being "exploited" is a bummer, you would think extending/documenting that would actually drive further adoption of the printers by building a more robust ecosystem around them.