Here's a short update on what happened since then:
1. DMCA takedowns did not destroy ad blocking (thank god), but there were a couple more times when it was tried, nothing huge though.
2. Streisand effect is a thing and the domain in question was blocked by everyone and everywhere. There was even a special filter list and later a browser extension which only purpose was to block such domains. It got some traction but later got abandoned: https://github.com/paulgb/BarbBlock. If something like that happens again I am pretty sure it can be revived very quickly.
3. The corporations still try different angles to prohibit ad blocking. The last example I know about is something like this: Axel Springer claimed that the web page and all its content (including subrequest) and ads is subject to copyright law. So when you modify the web page with adding new styles or blocking a web request you violate the copyright.