Look at point 3. I explained this could still be skipped due to them having to visually indicate that it was an ad. This visual indication could easily be skipped by the local user.
As for them deleting accounts that blocked ads, how would they identify if someone blocked ads? Generate a secret key for every ad, that would be returned every time a user watched ads? This could easily be overcome, as an adblocker could simply extract this key and send it back to the server.
Trust me… If there was a way to block ad blockers, the greedy capitalists would’ve done so a loooong time ago.