This is of course not including the yearly Unity subscription, where Unity Pro costs $2,040 per seat (although they may have Enterprise pricing)
Absolutely ridiculous. Many Unity devs are saying they're switching engines on social media.
Possibly, but can you expect an entire userbase, potentially millions of people, to:
A) know about the problem
B) care enough to do something
And C) know how+be able to apply that block
Especially when there's no effect for end users whether it does or doesn't go through.
A significant portion of players won't bother. Enough that the ones that do don't really matter.