I created a site a few months ago, I researched keywords and after countless hours found excellent low comp keywords with pretty decent searches. I have around 120 articles with purely spun content, it's actually pretty readable content. The site doesn't have any ads and has over 50,000 words of content. No seo has been done to it, I haven't even promoted it anywhere. It's been getting over 100 visits a day for a few weeks now and that completely caught me by surprise, it dropped down to around 15 visits for the past view days. Did I get a penalty or is it normal for sites to do this?