"The NRL has been struggling to attract teenage boys to the sport."
Whilst all football codes and most sports have a nagging problem with a participation drop-off in teenage years.
With RU it seems to be the lack of FTA media to give that required inspiration.
With NRL I would suggest that the islander participation in the NRL (about 50%?) is having detrimental effects.
Non-islanders are being "scared off" for want of a better expression.
if you're not a heavy set kid then AFL and soccer might appear as more attractive and worthwhile.