It's actually pretty scary giving out money (in any form) to international peoples potentially sanctioned by OFAC. Making it their problem through an EULA is an interesting strategy.
Going by this [1] definition of nonresident alien, I am not a citizen of the USA so I'm an alien, and I don't live in the USA so I'm a non-resident alien.
[1] https://www.irs.gov/individuals/international-taxpayers/dete...