I seem to recall (correct me if I'm wrong) that European courts ruled that “agreeing” to a very-long EULA for desktop software didn't constitute informed consent, because it's trivial to demonstrate that the users didn't actually read the entire agreement — even if they scrolled to the end, it's unreasonable to believe that most people read 10,000 words in 15 seconds.
So I assume that eventually these performances of consent-gathering will be legally judged meaningless.
It is IMO just a mockery of the intent of the law and I wonder when this will be punished.
I personally think GDPR might be a bit strict, but adtech have practically been begging for this for years so acting surprised now doesn't cut it.