If 90% of people in dubai ski, where exactly are they skiing? And also, what are the age demographics of these people that are skiing? If it's only prominent, middle-aged business men that are skiing on their trips to the alps and north america, you'll have a tough ass time getting more people in your park. If it's mostly youth and younger kids, someone needs to create environments where these people can get motivated by park skiing, and want to be there more often. If it is younger kids, there is a lot of things you could do to motivate them. You could definitely organize rail jams etc, but without frequent participation of the locals, those will be a bust and will have no long term growth effects on the sport.
I'd almost say loosely organizing a crew of devoted locals, for others to look up to, is the only thing that can help. Unless you have a crew that reps the park hard and often, no one who would be visiting will have the inclination to want to be there a lot. You need to find all of the skiers in your city, and get together to decide how you're going to do this, because despite the heroics associated with you single-handedly igniting the dubai ski scene, it will be a fuckload easier with the support of friends. So visit your local ski shops (or snowboard), maybe get a job at one so you're frequently interacting with any potential skiers, and recruit them for your cause. I don't know anything about Dubai, but it obviously has a lot of money in it, seems to be a youthful city, and is probably heavily influenced by the west - all very positive things in terms of having the right factors to get a ski scene going.