"Do you think the manufacturer made more of this chip after the club closed and added inserts and then tested hotstamp overstamps?"

No. No reason to do that.

There could have a 2nd order with the inserts, the place was open many years.
Or
The insert one might be the test run for the Fiesta hot stamp. Then it went into the floor sweeping pile and pulled out to test other hotstamps. Big lots of floor sweepings have turned up over the years. I have many of them.