If you're using Sublime professionally you can afford it. You're choosing not to. That's fine because there are some great free alternatives to use instead, but you have no reason to complain.
I think some software products could sell more with regional pricing, if someone could crack reliable non-intrusive verification.
Actually all the companies that offer regional pricing do that with the hope that their overall revenue will be higher that if they don't. It is a short term decision that does not have anything to do with humanity.
That said, Sublime Text implements regional pricing with nagware. A larger percentage of devs in poorer countries will be in trial mode, happy that they do not have to pay or use a pirate version.
But Sublime Text lets you "evaluate" it as long as you want, so by buying a license, you're not actually paying for the editor, you're paying for not having UNREGISTERED in the title and for not having window pop-up once in a while.
Even though that's probably wrong from ethical perspective, that's not worh 70 USD to many people, especially when they live in a place where average wage is under 5 USD/hour like Eastern Europe or Russia, not eve talking about India or someplace like that.
VIM is free and basically magic, Emacs etc.