Amazon commission fees for Everything Else category creep up

Looks like Amazon's fees are creeping up..for the "Everything Else" category, anyway, from 10% to 15%. My friend who sells more on there than I do recently sent me this:

Sent: Fri, 18 Apr 2008 4:04 pm
Subject: Amazon: Commission fees for the
Everything Else category

Greetings from Amazon.com.

We want to be sure that you are aware of a recent change in the Everything Else 
store on Amazon.com. On April 4, 2008, the commission rate for all products 
listed in the store was raised to 15%. On that date, our Help pages were updated 
and a notification was posted to the following page: Help - Selling at 
Amazon.com - Participation Agreement - Changes to the Participation Agreement. 
The previous rate was 10%.

Because you are a valued seller, we will be providing a 5% credit to you for 
items sold in the Everything Else store between April 4 and May 13. These 
credits will appear on your account after this period has ended, and you will 
receive a summary via email describing these credits within five business days 
after the credits are completed.

Thank you for selling on Amazon.com.

Best regards,

Amazon.com