They don’t have to necessarily deeply monetize to be successful, apple could play dumb and offer ad results based on search terms only. DuckDuckGo does similar and I do wonder at scale what kind of revenue this could end up being. Google doesnt behave in an entirely pro-business way as well. Google ads are not market efficient at the moment, with competitors taking keywords that are company names for example, forcing businesses to spend to be the first option even if the user searches your business’ exact name. Eliminating just a few insulting Google search behaviors and limiting data tracking could be a nice revenue stream