Well, if you were specifically making a point about indie plugin developers, you should've specified that, right? And since you mentioned indie plugin development, many solo devs work with Gumroad, and Gumroad itself has it's own regional precification.

I understand your point, and I believe most companies aren't interested in regional pricing because it's neither simple nor highly profitable to implement. That doesn't mean it's impossible or unsustainable, though, as you're making it out to be and as I've shown evidence to the contrary.