Ok. I have a client who has about 6 one-page static websites about their business. The pages have a 600+ word article on it, advertising their business. They have EMDs. Within a month, one was ranking #4, #10 and four were ranking #21. Overnight they have completely dropped off. I found one on page 18, the others I can't find. What do you think happened? The websites pass copyscape. I am thinking it is probably due to a lack of content. They all got slapped at the same time, so Google must have tracked the IP. My current plan is to add a blog and put 3+ posts on each, then try backlinking again. What do you guys think about this?