He linked to one site, it crashed due to traffic, so he added another link. Both sites began to fill with 99.9% comments FOR Ron Paul, with nothing but hundreds of different points of view on how it was a pure smear campaign, and completely discredited the actual article. I think once Drudge and the rest of the smearers saw their own story fully debunked, and comments making Ron Paul look good, he decided to pull the link.
It didn't work out as Drudge had intended.
Another factor that probably got it pulled - Ron Paul put out a statement, and probably asked drudge to link to it for equal time. Instead drudge pulled the links.