> The advertising ecosystem is an inherent part of the capitalist economy.

I doubt that; it distorts competition by making false / aggrandizing claims about products and their prices and capitalist markets would work much better with transparency instead of the smokescreens of advertising (i.e. more comparison shopping).

> In whose interest is it to kill that?

Consumers and small businesses would profit greatly if advertising played a smaller role (big businesses spend a lot of money in advertising to sell inferior products, small companies find it difficult to compete even with better or cheaper offers).

Also, page load times and traffic plans, obviously.