Mundane (think “mundo,” world, rather than ordinary) astrology is quite a different thing from what is published in the newspaper every day.
It’s how the Magi knew to look for the lion of Judah, king of the Jews, born of a virgin, in the opinion of many.
There certainly must be something to Crawford’s methods — on his website, it says he was ranked #1 by Hulbert Digest for Oct 1, 2007 to Oct 31, 2009 — and Hulbert tracks hundreds of newsletters.