Either they wanted to keep track of who handed out the freebie (not a good solution) or it's just sloppiness in reordering ("send me some more of those dollar In Play chips"). These could have been "parking tokens", as several of the downtown places did issue them to give you back your fee when you parked in their garage or lot.

eBay sure was more fun when you could see who won a lot! Now it's just a guessing game and I'm not sure who is "protected" by this an
anonymity
.