1. People who are adblocking are saying that they are not willing to pay with attention. You can only compare their relative willingness to pay with attention vs money when you provide both options fairly.
2. I don't take it as given that businesses have the right to make money however they want. There are human right principles and I think an important fundamental right missing from the UN Declaration is the right to not be subjected to subtle influence techniques that compromise your beliefs (even if those belief are about which soap you should buy). Any business strategy that goes against this principle should be illegal and if certain industries and businesses die as a result, so be it. I would take no economic growth over compromised human rights any day.