Vegas is an interesting place to launch IMO (and I believe they only operate in/around the strip). On the one hand all they really have to navigate is the strip which is just one giant straight road. But on the other hand most casinos on the strip have their entrances in the back and once you get off the strip and try to go up to one of these casinos it's a maze of roads. But that only speaks to the technical hurdles, I'm sure a big part of the calculus is that Vegas is very much a "novelty" kind of place and folks are much more likely to give it a shot when there.