The proposal was to "outlaw compensation for advertising". That would presumably include paying people to create ads and not just to publish them, hence the first example. What you're arguing is that the first example is different from the second one, but they were intended to be, because they map to two different parts of the process.

> The customer is (presumably) purchasing a product and is reading the documentation to understand how to operate it.

Product documentation is also available to prospective customers so they can review it to decide whether they want to purchase the product.

And then the question is, how do they get it? There are many ways to distribute. They could pay to print it out on paper and put it in the lobby in their corporate offices, but then customers would have to come to their corporate headquarters to get it, which most won't do, so obviously some methods of distribution have a higher likelihood of being seen. Then companies will prefer the ones that allow them to be seen more.

But they're paying someone for any of them, so "is paying for it" isn't a useful way to distinguish them.

And then we're back to, suppose you pay Facebook to host your documents on your company's Facebook page. Furthermore suppose that they, like most hosting companies, charge you more money if you get more traffic. Meanwhile their "hosting customers" on the "free tier" (i.e. ordinary Facebook users) have a very small quota which is really only enough for their posts to be seen by their own friends. So paying them for distribution -- like paying for any other form of distribution -- causes your documents to have better visibility. Now you can show up in the feed of more people before you run out of quota, just like paying more for hosting means more people could visit your website before you exceed your transfer allowance.

How do you tell if someone is paying for computing resources or eyeballs when the same company provides both? Notice that "don't let them do both" is a bit of a problem if you also don't let them sell advertising, because if they can't sell ads or charge for using the service then what are they doing for revenue?