So I own about 10 different amazon websites. Is it ok (aloud) to post each website under the same affiliate ID? Or do I have to go ahead and make new affiliate IDS for each website under my account? thanks!!
No I don't think so, but it's much easier to create different tracking ID's, just create a new aStore. I use the domain name as the tracking ID so I can tell which domain the clicks and sales come from. Just make sure the tracking ID you want to use is showing by logging in and selecting it before creating a link. You can easily monitor the tracking ID's from the reports.
Yes - it's ok to use the same tracking ID's for multiple sites. However, it's advisable to use single tracking id per site. This way you can track conversion and improve sales.
I would definitely go with different tracking ID-s. There is no such limit how many sites you track with only one tracking ID, but it is better for you, if you know how your sites are doing. With 10 tracking ID-s you will see how your sites perform, and can focus on the best sites, and improve the others. In default you can create as many as 100 Tracking ID-s, after that you can ask amazon to enable you more. I've seen sites, where the owner used more ID-s per page for the same product!