I had used ALN on some of these in the past, but certainly not all of them. Nothing dark-hat... maybe a little grey... no spammy comments or profile links. Many of these sites were ranking on some very good juice, like guest posts and Web 2.0 properties that I had manually built myself.... stuff like that.
Maybe it's a fluke... Maybe not. My sites have bounced around before, and I usually don't panic too much since I'm used to watching them dance. But, they normally don't all move down that much, and definitely not all at once. These are all pretty mature sites... most of them a couple of years old.
I have a VPS (Virtual Private Server) with Liquid Web, and most of these sites were on a single IP address. All of them were in the same Google Analytics account. Could Google be penalizing me by IP address, or by linking everything via my Google Analytics account?
Interesting, to say the least.
Anyone else seeing this?