They are, and this is why I prefer that such information appears in the short summary so that anyone looking to purchase for unique or usage rights is aware of the fact that the article contains links. It seems fair to disclose the inclusion of links that may not be appropriate for the purchaser's purposes.
Edited to add: I've requested that authors implement this practice in other posts -
http://www.constant-content.com/forum/v ... =9&t=14164
Thanks,
Ed
How to say no to a private requester
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