I'm using a template override (based on the Beez template) for com_content. It has this event position:
echo $this->item->event->afterDisplayContent;
I set in the config the position to 'onAfterDisplayContent'
but the link keeps outputting from this:
echo JFilterOutput::ampReplace($this->item->text);
So the link gets send along with the article-content output.
I have completely read http://compojoom.com/forum/10-newbies-area/205-display-after-content and all of the template-threads.