A lot of stuff gets retweeted without comment. I don’t follow the Onion, but I saw a lot of the tweets anyway. Their name isn’t even particularly ‘jokey’. There are plenty of legitimate newspapers with names like The Boomerang, the Reveille, the Gusher, the Flambeau, the Sunflower–there’s even The Florida Onion, the official newspaper of the Village of Florida, NY.