Well the way I see it Man utd, Chelsea, City have already been exploiting these markets to their max potential, whereas we have not. We are now starting to though, so whilst I believe their income from these markets will remain fairly constant, ours is on the rise..especially in China and India, but also of course in other emerging economies...
Marco, it's not exploiting the markets that's going to be the most effective in growing the fan base but winning trophies, the more you win the more new fans you get and usually they stay loyal. There is no real saturation point when it comes to the global fan base.