¿How many people can join in a meeting if I don’t host Jitsi in my own server?
On meet.jit.si, there is a hard limit of 75. If you use another provider of free jitsi-meet services, the limit could be different. It’s setup in the server config, not in the software (not that you could not hit technical limits anyway)
Maximum peer connections limit is 256 (on chrome). It means that 256 users can be interconnected!
The participants don’t use P2P connections when there are more then 2 clients. Each participant connects to the videobridge and communicates through the videobrdige.