@aral
Yes, ads themselves are toxic, drive toxic business models and toxic products, partly through centralising power, and of course by hiding better products and undermining trusted networks (eg person-to-person).
Aral, do you recall me urging you to look at Safe Network a few years ago because of these issues, to bring your UX ideas?
I know you have your own approach as well but hope that now it is happening it will be interesting to you - recently renamed #Autonomi