If some engineer at Rockstar had done this work, they would have gotten their regular salary and probably not much else, which probably would have worked out to less than $10k for the amount of time spent on this issue.
Let us spin it differently: contact Rockstar before publishing the details of the fix, and offer to help them on this issue. How much do you believe that Rockstar would value the fix *a priori*?
The truth is this kind of fix is worth a lot, but it is always tempting for the company to be penny-pinching (and come up with justifications for being so) after the fact.
Its probably because some project manager would have told the engineer who wanted to fix this that its not important.