Edit: wow I didn't realize md5 matching a picture was that easy, looks like you can make any image look enough like that twitter-deboonked one to generate a fake match. How has no one done this yet.
Thanks for the links, it's pretty interesting stuff I haven't kept up with for a while.
I didn't hear about that potential apple attack, I wonder if you could generate a collision with a pic that looks close enough to the twitter image they auto-deboonk and a pic that's completely unrelated, got twitter to add your new similar image to the auto-deboonker, and then troll on twitter by posting the unrelated image.
That'd be similar to that apple attack you linked, but it depends on how twitter auto-deboonking works and how easy you could get them to add a similar-but-different pic to their deboonker database.
If you're a convenience store but pallets of Coca Cola, then they kind-of can. They can just blacklist you from buying Coca Cola in the foreign country.
It's also different because they're selling you continuous access one month at a time instead of a physical good you drink and they can't take away from you. I've been to places where service costs are lower for locals than for tourists, and this is told to you outright. Stuff like museums, taxis, etc. It's a similar idea YouTube has.
Prices are also almost never based on cost, they're based on what people will pay.
I live in Canada, and cars are more expensive here than in the USA. US dealerships near the border refuse to sell new cars to Canadians, even though it's legal for everyone as long as you make sure to pay duties on the way back. I'm guessing each brand has some rule against it.
Ultimately VPN users aren't a protected class so it's legal to discriminate.