No, I think Dreyers, the company that makes ice cream, uses the limited space available in the aisle cap to showcase one or two of their most popular flavors. (Or one or two flavors that are seasonally relevant.) That's a totally normal use of the aisle cap, just like how a Triscuits aisle cap is all original Triscuits and the many secondary flavors that Triscuits come in have to be found in the crackers aisle.

It would be literally impossible for an aisle cap to feature every ice cream flavor available - there are so many that each flavor would have very little representation in the display, and the concept would fall apart as soon as anyone bought something from it. At that point, you're paying a bunch of extra money to send the message "check out our least popular flavors".