Arctic Circle bought their pies from the same place as McDonald's.
When I worked there, wsometimes when we were doing prep, something happened and, oh darn, a pie was unsellable.
We had a bucket of "dead" products. We'd have burgers and such in there that were past the prime. It was not allowed to consume any product unless we paid for it, not even out of the bucket.
The bucket was dumped at the end of the day. Closing shift had to "count" the product so they knew exactly how many pies were "discarded". They never ended up in a dumpster.
Also, I used to really love the chicken sandwiches. I've wanted to find where I could buy the patties for 40 years. They're the same ones Burger King uses but the big difference in taste was that AC added cheese and used "White sauce" instead of Mayo.
I know the recipe for white sauce.
It's been 50 years and I still remember the day we were told how to make the burgers. (The ranch burger was almost the same as a Big Mac)