If we don't use G20

i know there was some resistance to using the G20 as a way of advertising discounted tickets, but I’m having trouble finding an easy to use list that would be simple for people to reference and that i could point to. There are lists like the attached image, but that’s buried in a PDF on the UN website.

would this list be suitable to reference, and just say “if you live in a country NOT on this list, you are eligible…” - https://en.wikipedia.org/wiki/World_Bank_high-income_economy

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