I don't see why the presence of many mods should make one decide to leave the room unless one usually behaves in such a manner as to raise the ire of mods. (This does not sound like your usual way of operating)
So were the other mods behaving "badly"? One gif per 30 minutes doesn't sound bad to me, and I hate all the visual graffiti that CB allows (it's one of the reasons I do not use CB but I am a SC user instead)
As to why 9 mods? well camming is a global world we all sleep at different "times"
), It may just be that you were in her room on the rare occasion when all of her mods were visiting.
My model friend on SC has 9 knights (same as mods on CB, I think) and it is rare that more than 4 of us are in her room at the same time. But it has happened in the past that briefly during her shift most of us have been there.
As knights for my friend we generally allow her to concentrate solely on her show by keeping conversation in the room ticking over (it is generally a chatty room), keeping idiots inline and announcing (just text, SC doesn't have gifs thank god) informational things for her. My friend is not a native English speaker so having some knights who are, takes some pressure off her.
I know many models and even users, do not see a need for knights or mods, but I must say that most times I enter a room with no knights, the odds are that the chat will be full of idiots both grey and even some coloured users, either being stupid or inappropriate (this is something that drives me from a room, not the presence of knights). Of course I acknowledge that some rooms with knights are not as welcoming as they could be. I have even felt "unwelcome" in rooms that were actually populated by friendly knights and regulars who obviously know and respect each other and the model, one such room made me feel like I was the new kid trying to break into the highschool cool kids clique. They were not rude or unfriendly, just that I felt it was impossible to become a part of the conversation, it was like I had come into a particularly opaque Ingmar Bergman film 15 minutes from the end with no idea of what was going on.