Yes and no. There's a lot of moderation (by human beings) is now going on, nonetheless we got our stuff on digg frontpage thrice without any "extraterrestrial"

Yes and no. There's a lot of moderation (by human beings) is now going on, nonetheless we got our stuff on digg frontpage thrice without any "extraterrestrial" help, just submitted links. Last time it happened in Nov/2008. Yet, it did not help much to grow visitors, in all the cases it just resulted in a spike and fall flat after that. Digg is totally useless as a promo service, same is true about Reddit, Stumbleupon & Co.