I'd like to point out a case that the author has politely left out: that some conference organizers truly believe that if you were a good researcher then you would have moved to North America and/or Europe. And viceversa. I know plenty of researchers from South America for whom COVID was a godsend as it allowed them to attend three virtual conferences for the price of one and where their virtual experience didn't mak…
Unless there's a clause somewhere that says people who have a visa for Canada can enter Germany visa-free — some countries actually do that.
For example, UAE (the country where Dubai is) normally requires visa for Indian citizens, but if you're an Indian citizen with a valid US visa, then you're eligible for visa-on-arrival for UAE[1]:
> All Indian citizens holding U.S. visas, green cards, U.K Resident Permits, or EU resident permits can receive entry visa upon arrival to UAE valid for 14 days for a charge of AED 100.
[1] https://www.uae-embassy.org/visas-services/visas-for-non-us-...