28 years (+28) is better than now, but to my original point, in this era, hasn't Kim Stanley Robinson had enough time to monetize "Green Mars" (1994 Hugo award

28 years (+28) is better than now, but to my original point, in this era, hasn't Kim Stanley Robinson had enough time to monetize "Green Mars" (1994 Hugo award winner) by now -- at least enough to incentivize writing it in the first place?