Nothing happened to Drudge. He has been an infiltrator all along.
From Wikipedia
Matthew Drudge was raised in Takoma Park, Maryland, near Washington, D.C. His parents follow Reform Judaism. Both are Democrats who worked for the federal government, and he is their only child.[1] His father, Robert Drudge, a former social worker who owns the reference site refdesk.com,[1] and his mother, a former staff attorney for U.S. Senator Ted Kennedy,[2] divorced when he was six. Drudge went to live with his mother.[1] He had few friends and was an avid news reader and radio talk show fan.[1][3] In his book Drudge Manifesto, Drudge says that he “failed his Bar Mitzvah”, and graduated 341st out of a class of 355 from Northwood High School in 1984, giving himself, in his words, a “more than adequate curriculum vitae for a post at 7-Eleven”.[1]
In the 1980s, Drudge worked as a telemarketer for Time-Life Books.
Impressive resume. /s