Although betting/sponsorship could be an issue, i'm more leaning to the NRL trying to manufacture a product. They're constantly trying to change things. Speed up play of the ball, correct play of the ball, less interchange to bring in fatigue, multiple obstruction rules, shot clock etc. Most rules can be a tool for the refs to manipulate a game, if his decision is questionable, "some" of the calls could come down to 50/50's and it's inconsistent towards each team, therefore one team didn't get the rub of the green and lose. Towards the end of the season we will have 8 teams who are super exiting to watch or have a sob story about how they haven't won a premiership for a long time or ever. TV ratings/crowds and media stories will lift because of the excitement and so on.
At the end of the day it's highly likely all these changes come down to trying to lift the game to attract more crowds etc. It indicates things are not looking to good. What they should do is look at what made the NRL a great game to watch in the first place and evolve from there. The game was based on aggression, strength, one on one battles, emotion and now its determined by the NRL based on teams who have x factor and are exiting to watch. Teams without x factor will inherently be at the bottom for the table. Except Parra, they just SHIT!!