1) "Technically" possible. Google won't do that though unless there's an external, super strong push. 2) DDG can do that since its main target is tech-savy user

1) "Technically" possible. Google won't do that though unless there's an external, super strong push. 2) DDG can do that since its main target is tech-savy users (at least for now). 3) EU can do that until it doesn't escalate into EU vs US trade dispute. 5B is probably okay since Google really didn't even pay their tax in EU appropriately, but 50B will be big enough for US to intervene.