There must be some idiots running these places.
How the guy at the Wynn does it is how it should be done.
"We're just kind of going along balancing and are in great shape win on both sides, no matter who wins," said Johnny Avello, oddsmaker at the Wynn resort. "A lot of guys are putting down $125,000 or so to win whatever on Mayweather so we're high on him now."
This may be the case in most instances, just not here. Feel free to google it or read the link I posted. A lot of places are going to lose big on a McGregor win.
Because they're idiots.