I was in Vegas, in June, for 6 nights at MGM Grand. I was shocked to see during the day (regardless of weekend or week day) the minimums for craps was $15. The strange thing was a that round prime time,they would drop the minimum to $10. Around 11pm or midnight they would raise the minimum back to $15. I thought this was really strange to have the higher minimum during the day and then drop it to later on. I did not explore other main casinos during the day to see what their minimums were to see if this was a trend. MGM does not seem like a fancy enough place to be demanding $15 mins.