Having seen a few different situations, sometimes people may not pay because:
a) it’s quite expensive in their currency
b) they don’t really have a payment method available for international transactions
c) maybe they’re just poor and got some kind of a hand-me-down computer with their savings
d) culturally, in many places hardware has been seen as worth paying for, but software is seen as something you just copy (don’t even get me started on the pricing differences between app releases that do the same thing but run on Macs and on iOS/iPadOS devices)
e) there is a sense of entitlement towards bits, be they apps or photos or music or movies or TV shows