"Is there a reason that you can think of that may help me understand why your site is the only site that I know of where I cannot copy/paste an article?"

Be sure to check if the article you want to cut and paste is copyrited.

I've had one experience where I tried to post one such article. It was a no-go. I supplied the url to the page where the copywritten article could be found.

One way around the formality.