Amazon Showcase WordPress Widget
This widget is stealing 10% of your displays.
From the source code:
Author Note: My AssociateID will be automatically inserted 10% of the time. Feel free to disable this. */ ... // 10% lovin' if (rand(1, 10) == 6) $associateId = 'subversionfor-20';
It's only in the code. If you don't read it you will be unaware of it...