The difficulties in monetisation is what had been slowly killing RSS support on websites. There have been services that have tried to solve this problem, one is mentioned in the article, but they don’t seem to have had wide adoption.

It’s not just inserting ads either, today it’s also the pervasive tracking that makes money.

RSS was great for things like personal blogs, but commercial sites came to see little value in it, and have been dropping it as a result.