A ChipGuide Admin was able to traced the origin of at least one of those chip orders, and the recipient had nothing to do with Las Vegas or the casino industry.

Also, the majority of numbers are clustered between 1000 and 1100, with a few higher number outliers, such as the Bob Matthews 7011 chip above. That kind of supports the theory that these were numbers that Borland used to track something Borland related, rather than membership numbers to an exterior professional/trade/union organization.

Below is a screen capture from the ChipGuide. Interesting that there are some chips with a very similar design without the registration number. Maybe at some point he gave on the numbering system.