When I mouse over the "Riseup Support" link at the very top left of my TOR browser window, I see "Red Account" and "Black Account." What are these?
Red and Black accounts were a way to differentiate user accounts we used to use for a short time some years ago. Red accounts has access to some services such as email while Black accounts were able to access only to the RiseupVPN.
Nowadays we do not support nor use the Black accounts as anyone can use RiseupVPN without an account.