I would guess that those 2% of users account for more than 2% of the load on Docker Hub. Open source projects on a regular release cadence would push images more frequently than your average user, and those public images from the projects themselves were probably used in FROM statements more frequently than other images.
I think they used one metric (resources used) when deciding to kill free teams, then their PR team scrambled to find another metric to make the whole kerfuffle seem like a tempest in a teapot when the backlash hit.