AFAIK only Orion browser [1] comes with full 1st party and 3rd party ad and tracker blocking, by default.
If their money comes from advertisers and not users, they serve advertisers and not users. Supporting them as a temporary solution just means if they succeed we have all the same problems when the same incentives come into play.
Configurable.
> Will that last through a financial crisis if advertisers offer them more money?
Will Brazil win the 2090 world cup? I'm not sure I get your point...
> Supporting them as a temporary solution just means if they succeed we have all the same problems when the same incentives come into play.
Internet services are run by ads. Unless we can transfer to a model which is publicly funded or subscription based (even free software needs to pay for servers and employees -- the money has to come from somewhere) then the best we can hope for is an ad-funded service which allows you enough control to turn everything off if you want to.
Do you have a better solution and are you willing to start working on it?
Otherwise, you are making 'perfect' the enemy of 'good'.