say i have a forex site where i usually put my banner from cj. if i use the article and submit it to article directory with my CJ affiliate link, is it illegal?
There are no legality issues to it but you will be fine doing so as you will still receive commission.
article marketing is a common marketing strategy used by a lot of affiliates, so I'm sure its ok to include your affiliate link in your article
Why take a risk, just add the site to your cj account and then you can post those links without worrying.
There's no risk to not including a specific domain and it is mainly used for tracking purposes to see which domain is generating sales.
There is no "danger" for using such a method. There are no legality aspects to it and it is not a problem when it comes to breaking TOS.
Terminated for using affiliate links for one site that was added to your account on a site that wasn't? For some reason I doubt that was the reason unless the unassigned site broke CJ or the advertisers TOS.