There are a number of factors, from what I have been told. On a busy night when all tables are $15 or above, as they slowly close down over night, they never switch the lowest table until there is no one playing. Kind of a reverse grandfathering of people in at the rate. Once a table is empty, they might switch it to 10. They might also have an algorithm that tells them that at a certain time of the day, when there is a big convention/event in town (like rodeo week) that $10 tables will only be available for a short time in the middle of the day but at 3pm they all switch to the higher limits. On a week with no event, it might be 7pm before they switch. The stats behind the scene at a casino rival major banks. I have had a glimpse of them in a prior job but, at the time, was not a table game person so I never paid much attention to the details. The local casino, for the last month or so, has decided on the weekends to run $25 tables and they cannot figure out why those specific ones are empty 50 minutes an hour. Just over a year ago they rarely had $10 craps tables, they were mostly $5 on the weekends, and now we are up to $25.