Maybe via Digg first? There was an old article from 2005
Digg Just Might Bury Slashdot
https://www.wired.com/2005/11/digg-just-might-bury-slashdot/
"Digg's status as the new Slashdot is further enhanced by digg vs dot, a comparison project that finds diggers are usually first to the punch, though users of each site often submit identical stories."