Recently or in the past? If in the past, chances are they’ll not connect once they log out, which generally happens around every 90 days or so.
On what? It’s kind of important for you to advise if it’s Gemini, Uphold, or what?
Correct, because that has nothing to do with your region not being supported.
I mean, if you’re trying to get on Gemini it doesn’t look like you’re supported. Check out NOTICE: New region restrictions on verifying Brave Rewards with Gemini