Seriously? You think that's on the same scale? I've never even heard of it. You don't have top level pros playing it from many different countries, and it's invitational only. Look at some of the teams playing it, Panama, Venezuela etc. It was only formed 6 years ago and look where the final's been hosted.
Look at the history & tradition of the football & rugby world cups, football especially and the audiences they pull in on a world scale. Over 3m people attended those games at the last two tournaments over a month. The last time it pulled in less than 1.5m in attendances waa 1962.
The World Cup was first televised in 1954 and is now the most widely viewed and followed sporting event in the world, exceeding even the Olympic Games. The cumulative audience of all matches of the 2006 World Cup is estimated to be 26.29 billion. 715.1 million individuals watched the final match of this tournament (a ninth of the entire population of the planet). The 2006 World Cup draw, which decided the distribution of teams into groups, was watched by 300 million viewers.