Which website contributes to the Slashdot effect and allows registered users to up or down vote submissions?
Slashdot effect:  The effect has been associated with other websites or metablogs such as Fark, Digg, "Drudge Report", Imgur, Reddit, and Twitter, leading to terms such as being "farked" or "drudged", being under the "Reddit effect"—or receiving a "hug of death" from the site in question.
i don't know