actually you could make ok money from bookmakers in MMAT as mike used to auto populate the odds for IRL events from his real money maker site betmma then you would just set your edge percentage which could be from very tight to cream its up to you as bookie. There were a few bookies then so if you wanted customers it was better to keep your margins tight but you also had options with min and max bets
then you just adjust as you take bets in. It worked well and was not time consuming like in game betting where you have to check the fighters records, managers skills etc and then set your own odds from scratch
The IRL odds from betmma were the real bookies odds so no work. Of course odds change IRL though