>Enshittification as it was described by Cory Doctorow, who invented the term,

Cory Docotor didn't invent the term. He just made it more popular. Others used it at least 9 years before he did to describe "web design", and 3 years prior to describe the U.K. : https://www.oed.com/dictionary/enshittification_n?tab=meanin...

>Enshittification is a novel and illuminating concept, so we need to be careful not to let it turn into

The gp I replied to already used "enshittification" in a more general way to describe "almost all software". Most software out there is not the platforms that have the 2 factors you listed. I was just going going along with the conversation.

As far as policing the usage of "enshittification", you've got an uphill battle because people like the way it sounds and tend to use it as a spicy word to talk about anything getting worse. They're not going to research what Cory Doctorow was talking about and doublecheck to see if matches exactly what he was trying to describe. E.g. See it used to complain about "public libraries", "policing", "tech jobs", etc: https://hn.algolia.com/?q=enshittification