Sorry, but I just have to ask. I notice a few people create more then 1 clickbank account on their niches. And the only reason I can think of is because they are using their name as a tracking ID to see where the sales are coming from. Example I made 2 accounts with 2 different names one being squidoo3432 and the other wordpress5345. You can guess which name tracks what site haha. But, why cant people just use a simple Tracking ID on their affiliate links instead? Wouldn't more then 1 account get complicated for clickbank and also complicate your Tax ID info?
Usually at clickbank people have two accounts one for promoting clickbank products as an affiliate and other as an clickbank publisher to sell there products. Separate accounts makes it easier to keep track of these separate activities.
Having multiple clickbank accounts is not a replacement of the tracking id. Some people like having an account per niche, others tend to have an account per product. Others do it to limit the possibility of someone spying on their acocunt and finding out everything thats hes promoting - this one is very important especially with today's spying tools..
I have different CB accounts, I use them to promote different products on my blogs and websites across various niches. I do not think CB limits anybody to a number, so you can have many accounts.....
I use it to promote servies of various clients, I dont want to be associated with one product if it turns out to be bad.