Co-hosts don’t have to be paying members of Zoom. I am a free member of Zoom and am allowed to co-host.

I don’t know if you are aware Joe that the list of participants is searchable, so if you are looking for all the participants starting with 1, say, it brings up a manageable list to peruse which you could then screenshot. Also if I can’t find say 27, I search the list for that number and if it’s not there I know they’ve left.