The minimum CPC on a variety of Amazon Product Ad categories will increase on the 27th of August. You can see which categories got hit in this document released by the Amazon Product Ads team.
Here is the message sellers received from the Amazon Product Ads team:
Minimum Bid Increases on August 27, 2013
On August 27, 2013, Amazon Product Ads will be increasing the minimum bids in 60 bidding categories. We will not be changing the minimum bids in the remaining 114 categories.
In the 60 impacted bidding categories, we will automatically set your category-level bids to the new minimums. We will do this for your category-level bids that are at or above the current minimums and below the new minimums. We will not change your category-level bids that are above the new minimums or SKU-level bids that you have set using your product feed. You should review and update all SKU-level bids in the impacted categories before August 27, 2013.
If you do not want us to set your category-level bids to the new minimums, you can opt out of this change in Seller Central (Product Ads log in required). Just look for the “Minimum Bid Increases on August 27, 2013” notice at the top of any page.
Ads for products in the impacted categories will not be eligible for impressions as of August 27, 2013, if you opted out of automatic bid adjustment and your category-level or SKU-level bids are below the new minimums.
Please review the Setting Bids help page or contact our Seller Support team (Product Ads log in required) if you have any questions about adjustments to the minimum bids.
Amazon Product Ads
It’s about that fun time again when CPCs for all comparison shopping websites increase. Prepare thyself for CPC hell.