When I woke up this morning, half of my keywords from my main site totally disappeared from SERP. I checked again a couple minutes ago and now over 75% of my keywords (75ish keywords ranking top 5) totally disappeared. This is a big blow as this site was bringing in an average of $300 daily in terms of revenue. Could this be a Google Dance? I doubt it since the site was a little over 1 year old with stable rankings. I don't really know. As of now, I will play the waiting game and see what's up. No manual or spam action on GWT. Link profile was clean, diversified and strong. I'll do some research and try to update what really happened. As of now, all PBN's are still indexed and every single link I checked recently are still live.