With my employer's zoom contract, I can set up meetings for up to 300 people, although I can't imagine that I'd ever need to be able to do so. I've done meetings for about thirty that have lasted almost three hours with no problem. I'm also able to start scheduled meetings as early as I want and to go overtime with no problem. At some point, we switched from Skype to zoom, but of course with work from home orders, we've been using zoom a lot more. The only problem I've noticed is using a photo as my background, and the same issues arise with both my work and personal accounts.

BTW, I've been on zoom meetings with over a thousand people, but the controls have been set so that I can't see anyone except the host or the panelists, can't turn on my microphone, and can only send chat messages to a small group of "panelists" although on some meetings, the Q&A function allows everyone to chat with everyone.