Who knows, maybe they do it just to piss people like you off!!
I post mainly on forums where I can slug it out with liberals. Noticed the typo when I previewed this article on one of those forums. Had I not caught it, the first liberal reply would have been "Its a stupid article, he can't even spell".
The American Thinker is making a sales pitch. Being sloppy does not make a sale.
I do a local on-line paper which is miniscule compared to the American Thinker. We don't get paid. But we don't publish copy with typos. We have three people check everything.