Are you saying those are additional possible meanings of Pennsyltucky, or that you've heard people use it to mean all of those?

I have only ever heard it used to mean the rural areas between the two cities, in keeping with the saying "Pittsburgh on one side, Philly on the other, and Kentucky in between", which has of course confused people not familiar with the stereotypes or geography.

The other famous use of Pennsyltucky is the character in Orange is the New Black, which I've always taken to mean "she acts like she's from Pennsyltucky".

I guess we need to wait for the term to be used enough to get into a dictionary to get it well defined