Its a very good point. There are lots of orgs in company's whose whole job is to push shit from all possible points in the website - its probably called "real estate" internally.

These orgs have a lot to lose. But the company? Not so much, they will make it up and more - agents are great to use.

And yes ads are hard to place because agents let you bypass all this and give you a nice filtered view of exactly what you need.

Where do you think the world will head? Maybe Amazon will sell their inventory for agents at a hefty API price?