I don't know if the Global is done or not. I was the site of the first two Global's (www.placidwaters.com). It takes a lot to put on one of these events and we don't generate that much of an audience. I cannot say for certain, but I don't think the economic impact of the 2011 Global met expectations, due to the demographics of the crowd.
We do need more people to expand the sport - so many are dropping out due to a number of reasons; age being foremost and lifestyle changes being secondary. It is hard to maintain the skiing lifestyle - and few want to commit to it and buy a place on a private lake designed for skiing, buy a 3-event boat, train the requisite amount of time, and match your family's social circle with the sport. It is expensive and has costs beyond cash.
Then throw in the elite nature of the sport, the arcane rules, the labor heavy judging requirements, and the hazing rituals, and it is hard to get new people passionate while overcoming the structural issues. That does not mean all is lost - there are some real bright spots in our sport- the INT, EZ-Slalom, Nate Smith, Freddy Kreuger, wide slalom skis, wakeboarding, etc. Some are great stories, some are accessibility, some are just fun. In the end, we have to present a compelling activity that is fun for the entire family, social group, and community. We are not after spectators who buy tickets, we are after participants who bring along others. I believe that is the only way to grow our sport. If we don't grow, we will die out.