Doubts with overflow groups and Spatial festures

[whole sparrow]

Hi all!! I have some doubts about how overflow groups work. For example if we are developing some quests, custom developments and we want use overflow groups to a massive event
¿Will The quest appear and its available in all instances of my space? or only in the original room?
If i got videos, images, etc..., ¿Are we going to have this type of content in all instances and can we reproduce in all instances?
¿What limitations we have with overflows groups? I was reading the documentation, but I think, is not detailed with the new features that Spatial is including with SDK

[dusky moth]

The quest is compiled on the package, so it is not related to user capacity
In other words: everything you make on the SDK, is equal for the 50 users per scene.
Overflow groups have limitations with synced content (synced variables, sharing screen etc)