Yesterday I added Parity Bar to Swipe. Parity Bar allows you to set discounts based on where people are coming from geographically speaking. This makes products a bit more affordable to people in countries with lower costs of living and lower incomes.
To my surprise, I saw 4 sales come in almost right away -- as soon as I announced it on Twitter.
Also announced student discounts and had two students DM me, who then purchased.
Parity pricing works ;)
I'll be monitoring for abuse of course, but otherwise happy with the decision!