:I agree that it's not mere advertising on the linked "history" page. I was put off the site by the other 2 pages,  and , wherein they are trying to sell both certification to administer the test, and the test itself. Anything marketing itself as "creation therapy" is, IMO, just dripping with pseudo-science, and hence a non-legitimate external link (unless we add a strong disclaimer after the link). Not to be overly dramatic, but it's too close to Auditing (Scientology) for me to be comfortable with. 
 :If someone does decide to add the link back, i'd request that they do add a strong disclaimer following it (along the lines of "Arno Profile System - history, and Creation Therapy marketing").  
 :However I do remain against adding the link back, I'd prefer it if we just incorporate any pertinent info from the page, into our article. -