Page 11 of the Rulebook: “You must collect income if you can, but all other parts of the turn sequence are voluntary.”
Bonus income from NOs is income, so it must also be collected.
This question presumes one side eventually concedes when the balance of the game has irreversible tipped against them.
As a follow-on question, what made the difference between a relatively short game and a long game?
I have not yet played a single game of AA50 with tech. I choosed the 6-10 games option, but I think almost as many games I played have ended rnd 5 or sooner. So for me it’s about 50%-50% split between up to 6 rnds, and more than 6 rnds.
My record for “long game” I think is 9 rnds, maybe 10.
With NOs I would be suprised if games takes longer than 10 rnds. NOs are a mechanism for shortening games, b/c one side will get substansially more money than in a game w/o NOs, as soon as they start getting the upperhand.