One can also gauge the crowd size by the audience noise.
Biden's rally had cheers that sounded like they came from a small room.
Trump's rally had cheers that filled the massive auditorium.
Very few even want to go see the Potato.
Seems they are trying to get Joe out and about and ditch the hiding in the basement strategy. IMO, this is going to backfire on them. No one but the media likes angry Joe. (I guess they'd rather have angry Joe rather than Roomba Joe.)
Problem is, Joe can only speak for 20 minutes or so, even when they have him hopped up on drugs to change him into angry Joe.
I predict soon, they will pull Potato from most public appearances, claiming looming Presidential duties, and rely mainly on surrogates. Joe, as a brand, is not selling well except to the useful idiots.