Amazon is also in the negotiations pool with others to stream Fight Pass... so they're definitely getting in the game with this move. Fight Pass or not, this can only be good for the UFC to be available to more people.
I would assume they'll make it available to a world wide audience. While most overseas localz have it available on free TV as a part of a paid network deal... there are likely a lot of placez that don't have that deal... & have no other way to watch... (outside of illegal streaming)... so maybe this reaches a whole new audience? I'm just guessing... I'm not sure how far Amazon's reach is worldwide.