Getting a majority of Moroccans behind a referendum on Western Sahara would be a total game-changer. That's a tricky proposition, but I think the younger generation is more likely to be receptive to overtures than older Moroccans, who've had longer exposure to Greater Morocco propaganda and might've lost family and friends in the war with Polisario. Plus, Morocco's youth bulge means they're going to be the dominant group soon.
To that end, I think the Western Saharan cause needs an internet game with pro-self-determination overtones targeted at young Moroccans. It shouldn't hit them over the head with the Sahrawi message, just something subtle that's presented along with the main game. A bowling game called Frente Bowlisario? Maybe.