[IshKebab]

Not necessarily. I could imagine Google adding a "paid crawling" service where you tell Google how much your content costs, explicitly allow them access via some authenticated method, and then they display the price next to your content in search results.

You're imagining that it can't work because it can't work in a generic way with all search engines, including future ones that don't exist yet. But that doesn't have to be the case. Most content providers only care about Google.