Depends, is it real human or bots, from targeted links or not, paid or organic? These are what I mean by "traffic is not a useful metric for measuring the casino's performance."
I disagree. Traffic is everything and it is what most people check out to observe whether a particular site is doing well or not. The first thing that any customer would check while researching a site is traffic (Alexa ranking, Chat room players etc).
The traffic can be natural or artificial, but the numbers are what matter at the end of the day. Mintdice is doing really well in this area and are improving in a short span of time making them a competitive site in the crypto gambling realm.