I have a brother HL-2360DW circa 2017, with a new brother large-size authentic toner cartridge. I never hooked it to the internet, never updated the firmware. And it started saying low toner even though I've put (far?) less than 250 sheets through it.
There was a way to turn off the low toner warnings, I did it, and seem to be ok, but it makes me wonder.
EDIT: wow, it sells for $449 on amazon. I paid $115 in 2017.