Edit: i realize i read the question wrong, and the answer is yea you can on both sites. Just read the TOS 1st so you dont do something unintentional and get busted by the cam cops.
im no model but this is what I've observed with split camming. not opinions, just some things I see happen.
positives - are more tokens possibly, more notoriety/fame , better video sales possibly, more interaction for the model because of 2 chats - more show due to more interaction w the menu and model possibly, less boredom, different crowd of people can be nice, possibly more privates/ c2c revenue, more regulars possibly if you make a good show often
negatives - less personal interaction , possibly less tokens, possibly destroy cam score if the nights not busy on mfc, less attention given to 1 or both chats because your attention is divided, more mental juggling keeping track of requests possibly , 2 c2c's at once possibly might be rough to manage, sometimes viewers might not know about 1 site and could get confused and might result in leaving, angry, not tip, or leave or sit silently and try to work it out whats going on, viewers left out of conversations and also different chat convo's can confuse, leave out, or frustrate some viewers
my own gripe: i don't like tip chimes at all, and 2 different chimes can possibly be distracting to the room.
personal opinion :split scamming is gonna be different for each model, and how they interact and manage the division is what makes it work or not i think.
viewer problems are gonna happen no matter what so I ignore that part of the equation.
Do what works and try it , if it doesn't pay off how you want, then try a different strategy
Good luck im sure you will find your groove!