So apparently yesterday Google went through and did one of their mega slaps on affiliates. I was fortunate enough to have no idea it happened, because none of my sites were slapped. All my QS held up as great and I actually saw much greater profit margins because many affiliates were slapped, ads taken down, allowing my CPC price to fall.
It’s pretty ridiculous either way, I know a guy who has held a site in the #1 position with a 28% CTR for over 5 months…slapped like he was nothing.
Anyways, if you want a quick fix just re-upload everything. You may have to work on getting CPC price down naturally again, but you do the best you can.