You're thinking far too 1984 when the answer is much more Brave New World - if the ad blocker in Chrome is good enough, people will just stop supporting UBlock.
* Enable Developer Options
* Add Ublock package zip
* Enable in Incognito as well
TL;DR: Them removing it would be a dick move, but not end of the world. We can still install any packages we want.
I commented about it about a month ago[1]
Have you tried Packing them? I have yet to experience this.
Which Google have done to other extensions many times.