Edit: on reading the article, his source for the assertion seems to be Parler employees: "Indeed, a Parler executive told me that of the thirteen people arrested as of Monday for the breach at the Capitol, none appear to be active users of Parler."

He reported that on Twitter as "Do you know how many of the people arrested in connection with the Capitol invasion were active users of Parler? Zero."

I think that's bad journalism even if you agree with his conclusions. It's single-sourced and the source has every reason to downplay their involvement in the events of January 6th. I think that at the very least, Greenwald should have checked those 13 users to see if they had active Parler accounts, rather than just taking Parler's word for it.

Further, the number is inaccurate. The DoJ press release (https://www.justice.gov/opa/pr/thirteen-charged-federal-cour...) says 13 people were charged in federal court, and 40 were charged in superior court. That was as of Friday; I can't quickly find info on whether or not more people were charged over the weekend, but then again, I'm not a professional journalist.