My experience with using Zoom where some people have pro accounts and some do not (my employer) is that when the pro account joins, "PRO USER has become the host", and the timer goes away. Likewise, when they leave, "FREE USER is now the host", and restrictions return.

They don't want me creating a meeting for my friend Steve, giving him full benefits of my pro account, but with no intention of me actually attending. But I also haven't seen any way to deal with this for personal accounts when multiple users have pro accounts. We have multiple attendees with pro accounts, but I can't seem to pool them together so that as long as one of us is around, it still works.