A couple things: the large number of VBM ballots includes states who only have VBM as an option. Also, there are battleground states like NC that began counting VBM ballots more than a month ago and will release those numbers right as the polls close on Election night like they always do.

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store