Earlier quoted context omitted.
Install bombing is still a problem. Unity, for all its "clarifications," keeps promising it won't be a problem and then refusing to be transparent about any of the ways it could possibly be less of a problem. Either they backtrack on this whole lifetime install count scheme or this blows up even more spectacularly when January rolls around.
I don't understand why this is a worry - they will do it the same way Valve/Microsoft/Epic/Blizzard identify how many machines you have their product installed on - with a unique hardware ID that will make sure you aren't charged twice for installing the game on the same machine. It's not rocket science, it's been used in the industry for ages.
With the examples you listed doesn't it require an account to authenticate first before achieving this?
Furthermore, is this not easy enough to spoof? Without account based authentication (which as far as I know Unity does not use/require?) what stops me from spinning up VMs or emulators repeatedly to attempt to install bomb?