One of my sites with 15k indexed pages, getting 2k UVs daily got deindexed. The site is keyword-based targeting across a few niches. It's nowhere to be found on site:example.com query. Of course it not really be deindexed, it could be back after a week or so based on what I've been told. I'm hoping its the case but it's really unlikely. It's a pain because this site already brought me high $x,xxx in the past but the earnings declined after old strategies and keywords died out. They could have just banned the site in AdSense but they instead killed the site's traffic. :| I put a lot of articles, targeting different keywords then made them ranked. And its making me low $xxx every month so far until it got deindexed 3 or 2 days ago. I have a few ideas that might explain why my site got deindexed. Just a month or two ago I made a radical approach into increasing its traffic by doing offsite SEO on a around 90% of its pages. These are the new pages from the articles I put recently. I did a massive backlinking campaign using a few tools I found here. Pinging the new posts, and then blog lots of blog commenting. That's the only culprit that I could think of. I have another site where I put another batch of articles targeting different keywords too, with identical website WP theme and article structures... but it's still in the SERPs (although this site has been banned in Google Adsense for a few months already). The only difference is that I didn't do any pinging or backlinking on this other website. So why am I making this thread? 1. To vent out as this really hurts me lol. And to push myself even further to work on my other ideas, which I have lots of, I procrastinate a lot but I've been working on them actually even before this deindexing happened. 2. To tell you to avoid doing anything drastic on your websites, rapid link building etc. 3. To tell you to stay whitehat on at least on your money making site/main website or if you can't just try your best to stay under the radar by doing things at minimal quantity and rate. So my approach now will be blackhat/greyhat on supporting sites and only and completely whitehat on main/money website.