I'm about 9 months into my save, with my own promotion and OMEGA just opened.
Yeah, they've approached pretty much my entire roster. It sucks that I'm 15% away from offering exclusive contracts and I'm growing really slowly. Oh well, gotta take the bad with the good I suppose.
Luckily for me, I like to book my shows a minimum of 6 months in advance, so any shared fighter, they can't really book until after six months and the fighter's recuperation and all that.
Although I do have this annoying "problem" where none of my champions seem to be able to get through their first title defense... I'd say 80% of my champs, lose the title in their first defense.