You win a Nobel, and you get instant fame.
Disgrace, which seems to be the latest novel by Coetzee, has been propelled to #8 in Amazon sales rank. It was #7 yesterday...
Another book, Waiting for the barbarians, is #24. Others don't show up in the radar. Maybe they were further down the list of results returned when you search "Coetzee" in Amazon.
Even if you didn't get around a million dollars for the prize, I guess increased sales would be quite enough.