I visited the cage last night during break and was told that YES, all the $5 Grand Opening chips were sold BUT some are coming back in and being cashed so you can get a few depending on the day, but NOT in quantity.

Here's what I think happened. After a few days, the remaining chips were mixed in with their regular rack and put into play. This would explain how each day a few come back in and get cashed as I'm sure no one is bringing in chips bought at the cage just yet for redemption. Again, I don't know this for sure, it's just my assumption based on what I was told at the cage.