$10m for how long? I'm assuming that it's $10m a year?
Then if things go bad in NSW they can take that number to VIC, WA, NZ, wherever, and say 'QLD offer ed us $10m, what would you offer?' and bounce them of each other, then next year after QLD paid (e.g.) $12m, they can take that number and the number that QLD made from tourism, etc, and start the process again and hopefully get (e.g.) $14m from somewhere else, and so on.
If you do it as $10m a year for 10 years, then you've got to wait ten years before you can hear opposing offers when after year 2 it was clear that the GF was/is worth more then the $10m a year that you are getting.
Of course you may have to take less to start off, as QLD may offer $10m a year for 10 years but only (e.g.) $8m for one year and nobody tops that offer, but I doubt it, I reckon you could get Melbourne and Brisbane (at least) in a bidding war straight away and get more then that $10m offer, if you played your cards right.
I'm sure you could grow the value of the GF more quickly by having the GF being more flexible and able to adapt to the market as quickly as possible by selling it each year then by selling it in 10 year lots.
They're doing it with the third SOO games, no reason why they couldn't do it with the GF, and it'd be a better result all around in my opinion.
Nope they need to take it away for an extended period, otherwise the NSW government will think that it wasn't as much of a disaster as it could have been and they'll repeat that to the voters over and over to save face, and it leaves open the opportunity for them to try and out stage other places that are hosting it to make the NRL look stupid for taking it away from them, which I'm sure you can tell would leave the NRL looking stupid and not the NSW government...
And you can bet your arse that Labour is hoping that they can play it so that the Libs lose the election but they can still keep the GF in Sydney, the NRL can't let them do that otherwise it sends a message to everyone that they're easily manipulated.
The NRL has to make it a lose-lose situation, either the government goes ahead with the deal and risks the election or they lose the GF for a very long time, either way the government comes out looking like the arseholes and not the NRL, and it sends a massive warning to other governments of don't try to f##k with us cause we'll ruthlessly screw you over.
They've got to take it away for at least a decade or so, preferably for the length of the contract that the NSW government has torn up, otherwise you're just letting them save face in the eyes of the NSW public which would be a terrible outcome for the NRL...