Thanks for the tip, FAB. However, I am not sure Darryl McEwen is correct on that.

I question his theory because I hadn't ever stayed at Rio until 2013. Prior to that, I just drove to the WSOP from my place in Las Vegas.

It is true that most of my PLAY was at Rio, provided they count the WSOP as play. But Rio was my "home casino" before I stayed a single night there.

Perhaps they determine your home casino simply by how many play days you have, which means that, indeed, I probably have the most at Rio in a given year.

Really sucks, because as I said, they see that I don't play anything but the WSOP there, and I often get an attitude when I deal with their hosts.