I don't think the distinction between the two matters all that much for this article's purposes. Men not having access to high value women to incentivize the labor that society needs means society gets less of that labor, regardless of why the men don't have that access.

I do agree with you that the writer is using the term "incel" when MGTOW is more fitting. It's probably one of those rare misapplications of the term that isn't malicious. I also agree that MGTOW is a much bigger threat to the feminist project than incels are. Incels make for useful bogeymen, but at the end of the day they're just an optics problem that the feminists need to sweep under the rug. They can still theoretically be controlled because they still desire female attention (although in practice that would require a far more credible carrot than the feminists are willing to offer). That's why driving them off mainstream sites like Reddit was enough. MGTOW on the other hand has the potential to derail the entire clown show if enough men adopt the lifestyle. That's why they're going scorched earth on MGTOW. It's really easy to see what the regime really sees as a threat by looking at how hard they go after different dissident communities.