Following the trail from this article brought me to this...Beyond Biden, Brennan, and Clapper: How Grenell’s satchel tells us this is on the right track
The exposed contractors were very likely to be individuals from the same company who worked government contracts that that company held with both agencies.
The company is the one John Brennan was president of from 2005 to 2009: The Analysis Corporation. A major reason this hypothesis resonates is that the TAC contract with both agencies is for database maintenance and analysis. (The contracts are still active. They were very long ones, obtained in 2008 and 2009, running into hundreds of millions of dollars.)
Now I know a little bit more about who those unknown contractors I was thinking about the other day may be.
Pointing the finger at Crowdstrike and Fusion GPS may be misdirection/cover...IMHO.
Look there, not anywhere else. YMMV
See 57. Some things to think about.
Sidney Powell does not think FusionGPS was one of the contractors.
At the five minute mark of a lengthy interview she gave last year:
https://www.youtube.com/watch?v=1bR2E5BdwVM