My knowledge is that you can only have a linked Paypal account associated with one username on eBay. I tried this years ago separating business lines but could not get it to work.
Owner and President
Desired Attire, Inc.
26K eBay Feedback
Hi Thomas and welcome to the forum,
They may have changed their rules sometime after your inquiry Thomas, but I've had three eBay accounts all hooked to the one PayPal account operating at the same time, no issues.
As you only have the option of having two PayPal accounts only, it wouldn't make sense for eBay to allow more than two accounts because any more than that would be rendered useless if you had to have a PayPal account for each one and I'm not aware of any set eBay account limitations personally.