It seems to me that growing crowds is a tough ask for all codes with most/all games live on TV or on-line. I had a look at crowds since 2007 and all codes have struggled. Remembering back to the GFC Rugby League was the code that the doomsdayers were predicting would suffer the most.
I would love crowds to grow but its not just a struggle for Rugby League. The media sometime hype up some of the big events in A League and Union but overall they aren't growing either. I would love a 20k average but think it might take a while. Getting to 17k would be a big achievement as we have been stuck in the 15k/16K region for ages
2007 2014 Rise/Fall %
Union 21233 18191 -3042 -14.33%
A League 06/07 and 13/14 14025 13025 -1000 -7.13%
NRL 15750 15905 155 0.98%
AFL 36793 32333 -4460 -12.12%