hang on, 350k/7 is $50k per team (which seems a bit high, but we'll go with that). That isn't actually as much as you're making out when you compare it to how much pokie money is floating about in the ASBP.
As termy said, it's about 15% of a teams total budget.
Yes it's about $350k of the O League prizemoney goes back to the ASBP, but unfortunately NZF trouser about $80k of that which means the other franchises get about $30-$35k each. Correct me if I'm wrong on this. Still a pretty good contribution off the back of ACFC's efforts. It would be nearer $50k for each franchise if NZF didn't make its unjustified grab which would push it up to nearer 25% of some team's total budget.
I gather that what ACFC keeps of the O League prizemoney makes about 35-40% of the club's ASBP budget, less I guess recouping any extra out of pocket spending on the O League campaign.