I would recommend anyone who is new to Brave/BAT to avoid dealing with Uphold. They have terrible customer support, their web interface is atrocious and completely unintuitive, and they have bizarre, complicated rules and processes for withdrawing funds.
For example, they divide cryptocurrencies into “tiers” and then have arbitrary rules that prevent you from withdrawing funds in a certain tier. And when I say “withdraw funds”, I mean just transferring them to another (i.e., external) wallet. Just as absolute scam.
I was excited about the Brave Rewards program when I first learned about it a few months ago, but my experiences with both Brave Support (which seems to be almost nonexistent) and Uphold have really soured me on it. Wow.