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.
This is vastly more difficult than you think. For example, if you try to use the standard method, which is hard drive serial numbers, it's incredibly easy to spoof AND all prebuilt computers from Walmart share the same serials. Non-starter.