Why this was, I don't know. A camera store, even a smaller one (but more than a film drop-off) could easily draw foot traffic inside the mall as well as any number of other specialized stores that had inside access, and there were other fast-food operations inside, such as Orange Julias, Chick-Fil-A and lunch counters at Edkerd's and Woolworth's.
At any rate, Baskin-Robbins soldiered on with its odd location for a good number of years until around 1996. I noticed some activity in the store recently (first picture), and it turns out that it is to be reopened (or perhaps already is) as a barber shop.
UPDATE 9 September 2011: Commenter Weston points out I was wrong about the 96-ish closing date, I've changed it to something less specific (Late 90s/Early 2000s) for now.