The fact that they're making more net money from those regions than they otherwise would, by definition, makes it literally impossible for you to be subsidizing them. The alternative is not listing in those regions, not lowering prices for you. There is no theoretical world where you get a cheaper price in developed countries without regional pricing in lower income regions.
No, there's not even a theoretical possibility for that to happen. Lower priced regions are lower priced because there aren't a meaningful number of people in those regions able to pay first world prices.
Lowering the global revenue by whatever small amount those regions bring doesn't somehow incentivize publishers to lower revenue further by lowering prices in the first world. It makes no sense to think it does.
If your local store isn't following Costco's policies, that's not Costco's fault. Report them if you really want.
A membership is absolutely not required to use the "food court". The machine doesn't scan or use your membership at all. The rest of your complaints are equally bold faced lies that don't in any way match Costco's policy, or full on unhinged lunatic horseshit.
Steam: New Pricing Needed For Argentina and Turkey by November 20th (steamcommunity.com)
I suspect piracy will become increasingly popular in these countries
What are some companies that deserve to be boycotted to death?
So far my list includes Comcast, EA, and Nestle. Tell me yours, and I’ll help out.