Ryan,
Meet me meetings are just like ad-hoc conferences. With the ability to chain conferences together ( via the Advanced Conferencing Features service Parameter), you can create smaller conference bridges (like 4, 6 or 8) that can be bridged together when needed. So if you set the max conf participants, then that will not allocate all resources at one time, but will cap the conference at the largest number of users.
Thanks,
Dan Keller
Technical Marketing Engineer