The only solutions that will be widely adopted will be those not controlled by anyone, i.e. decentralized protocols.
Not so sure about that!
Problem is that there are much more lucrative monetization gamification models than advertising, which spam and intrude on users less. Advertising is going to die and be replaced with superior gamification which is more attuned to users' preferences.
Interesting! Do you have any examples of "lucrative monetisation gamification models"? Conventional online advertising seems to be on the verge of death indeed.