That's not the point. Though those companies will inevitably exist, there will be others that build more creative, less intrusive/distracting business models.

That's not the point. Though those companies will inevitably exist, there will be others that build more creative, less intrusive/distracting business models. Remember advertising before adsense? Users with purchasing intent are now provided a convenient means of acting upon that intent, and those without it are far less annoyed by text ads, that are less interruptive than the banners that that used to dominate the scene.