Breaking TOS agreements could lead to them suspending your account and possibly banning you from the service, but that is the extent of it. They have no recourse to sue you for money without provable damages.
As I said earlier in the thread, not watching a commercial isn't going to cut it as far as provable damages goes. It's not really any different from you getting up and finding something else to do until the commercial is over.
That said, they won't. There's no benefit to do so for them.
Also, TOS agreements are often full of unenforceable nonsense. Just because a TOS says you owe a company money if you do something like block ads, doesn't mean they actually have any legal recourse to recover any money from you in court.