for ebay and myspace, you can only use the simple Image tracker and gather basic data only.
I added some doc in trunk:
Image Tracker tag
› Display Image Tracker tag
The following parameters can also be passed to the image URL:
* action_name - Defines the custom Page Title for this page view
* idgoal - The request will trigger the given Goal
* revenue - Used with idgoal, defines the custom revenue for this conversion