I'd imagine it varies massively from fighter to fighter. Your best bet is to contact the ones you are interested in and find out.
"You see a mousetrap and I see free cheese and a f**king challenge"
~ Scroobius Pip
My Super FFL Team That Most Definitely Isn't Going to Come 2nd Last This Year!
Jose Aldo • Carlos Condit • Hector Lombard • Edson Barboza • Anthony 'Rumble' Johnson