I think he is hedging his bets about returning to Union due to the upcoming World Cup.
Whilst the Roosters may have offered 500K I wouldn't be surprised if they are hoping the NRL steps in and supplements the offer. I thought Abdo said at some point they would help players stay in League instead...
Dunno mate I'd give him a miss, from the Australian newspaper below.
STORM’S $860K LIABILITY
Big Nelson Asofa-Solomona has now been charged 26 times for foul play since joining Melbourne Storm.
You name it, he’s done it - dropping knees, raised elbows, lashing out with his feet, attacking...
Been a big supporter of Luai. However, the game changed when he put in the attempted grubber on the 2nd or 3rd tackle and the Titans picked it up. From then on the momentum shifted and we were gone.
Similar money to what Brown will earn at the Knights, for me, Luai offers more with respect to his leadership he shows. He seems to drive some of the standards which was not as evident in previous years. As you say let's see what next year brings.