I think we can all agree its impossible AMD GPU sales improved. The only logical explanation I can see is that AMD discovered a large cache of pirate treasure and is purchasing their own product with it before dumping said product into the ocean to hide the evidence.
Or they could be dumping product into the channel trying to clear the way for Polaris. If they have excess inventory, it would make perfect sense for them to force chip sales onto AIB's with the promise of higher priority for Polaris chips at release.