The main point to participation numbers is that those kids that play at a young age tend to be fans for life.
And that does nothing to keep playing numbers up. It's all well and good to keep people engaged on TV, but if that's all you are doing then you have already admitted defeat.
Playing the contact versions of these games is in the end all that matters. If less and less kids play the games each year, and that is certainly the case in NZ and it seems Aussie, then no amount of "participation figures" featuring non contact versions of the games will save the game.
The problem with Team contact sports opposed to individual ones is that you need a certain number to have a game.
It only takes one or two kids short of 26 before all the remaining kids can no longer play the proper game. When teams start to default because they don't have enough players then clubs start to fold when the remaining players go elsewhere. This continues then even the professional game is gone because there are no longer youngsters to select.
It is naive, even stupid, to think this can't happen, because it is happening here right now.