Region locking was more that US videos were 60hz ntsc and most of the rest of world was 50hz pal, and multi-region hardware was fairly rare Throw in the diffic

Region locking was more that US videos were 60hz ntsc and most of the rest of world was 50hz pal, and multi-region hardware was fairly rare Throw in the difficulties in buying non-local things in the first place and it simply wasn't a problem, they could market-segment to their hearts content