>Facebook told the oversight board that the program applied only "to a small number of decisions," which the company subsequently acknowledged was misleading
Indeed. Millions of users is a tiny fraction of Facebook's total user count, so in terms of absolute numbers it is probably a relatively small number of content.
But in terms of reach and influence, I would expect the VIP users to have by far a disproportionately large share. I would also expect them to be the most likely to post content that would end up in front of an oversight board. But of course, they are also the ones most able to raise a stink if Facebook moderates their content...