You're right Ubiquiti did it though and I believe their devices are priced even higher. (Edit: note the post next to mine says you can opt out of this.)
I agree replacing the stock firmware with an open-source aftermarket one like OpenWRT is the way to go but there's still the moral dilemma of supporting such practices with your wallet.
I was also thinking if this could be an attempt to thwart the second-hand market for their devices? Is the binding to the online account permanent, or maybe it requires unbinding the previous account first?
Is there additional telemetry that cannot be disabled?
If Ubiquiti staff has the non-existent procedures and corporate security for this to happen, they surely don't care about your privacy or security.
Not cool to do that :(.
Open source is the only equipment you can trust to not adopt this model as it’s much more profitable than shipping a box once every five years.