What an odd choice from Mozilla and Mullvad to segment this based on geography. Can you use it while traveling outside the US? Why not simply have a wait list?

What an odd choice from Mozilla and Mullvad to segment this based on geography. Can you use it while traveling outside the US? Why not simply have a wait list? Mullvad already operates globally - what is the reason for the geofence? Is Mozilla not able to accept payment outside the US? (maybe not able to pay taxes?)