Philipp,

Chitika is based on the shopping.com api. However shopping.com has their own affliate program and you don't have to share it with Chitika.

Chitika does a bit of contextual filtering to pick products to show.

However, with a modicum of programming skill, you'd be better off going directly to shopping.com, using their API and selecting from a list of possible products to show – especially since most of you content is relatively un-product related.

Plus you'd be keeping more of the revenue yourself.

Interesting. That's absolutely what I would do. I'll check the shopping.com API.

Here from Germany I see the same ad, just it's translated to German...

I'm on it. I love it. It works fine. You should've signed up through me :)

John, or anyone, where on shopping.com can I find information for affiliates/ developers?

I've found it does add a little bit to ad revenue, and doesn't take away from what you're already pulling in. Its a good way to pull back in those eyes that don't look at Google ads. I know that when I see a Chitika ad, I check if there are any good prices today. It ads value, even in a non-contextual way (since you have to turn off the contextual ads to work with AdSense).

ProBlogger.net has done a lot of work with Chitika and has excellent reviews of it along with tons of tips.

I have been using Chitika for a week now and must say the revenue is good.

Philipp-

I've been working with the Shopping.com API for several months now. I'm starting to blog about a little bit about it (see here nextgenerationshopping.com/) – drop me a comment there and I'll get back to you (if you still are looking for information on it).

You can see the API in action here: secretprices.com/