Even for a league game, the Halliwell jones always gets 14,000 a match, and is limited by it's capacity, a bigger stadium would bring a bigger crowd.
14,000 is better than any RU league match, easily, and better than some championship football matches too.
Only the other day, it was claimed that RL is the second most watched sport on sky, the fact that i'm willing to watch Leeds, a team i can't stand, to get my fix says it all really.