The ad based revenue model is done, yes. A lot of sites will still exist though behind paywalls.

Doesn’t that mean that search products will also struggle, since they rely on everything being freely available?

Well, I would assume a lot of the producers, for example people making products would still have sites the agents could pull from to have up to date information. You'd most likely lose a lot of the middlemen that take that data, add something, and then cover the page in ads.

There are also tons of ego websites that aren't going anywhere from what I can tell. Tiktok will still be around unless it gets banned, and something else will pop up behind it if it does.

Product descriptions are a good example of info that will still be published, because people will still by buying and selling products. The problem is with writing where the writing itself is the product, such as news.

The LLM relies on free access to that writing in order for it to be informed about current events. The news publisher relies on readership to pay writers. If LLMs are too useful to the point that people rely on them alone for news, then ironically they will become worse products over time as the publications they draw from go out of business.

Who says this is true? The AGI will certainly be able to figure it out without depending on some crap medium blog