I think the link should be restored It may not be palatable but External links are for readers looking for more  and once theres at the end of this article theyll know exactly what theyre getting themselves into It also seems encyclopedically remiss to not link to the actual subject of the article Regarding objectionable amounts of advertising thats meant to prevent spam links I think in this case when the link would be to the articles subject itself that sort of thing is or should be exempted