ColourOfSpring - 9:17 pm on Jun 3, 2013 (gmt 0)
Directory submission for links, article submissions for links, blog comment spam for links, press releases for links, forum posts for links, sig links, fiverr links, and the list goes on... but what about investing in preferred content on your domain itself and getting earned links?
If Penguin were a 100% mirror of manual unnatural link penalties, then I think we'd know that by now. It's more complex than that - I've seen sites hit by Penguin that didn't match that kind of "unnatural links" profile, and they must have triggered the Penguin algorithm another way - likely onsite content including internal linking. As I say, we do not know what "THIS" is - and the many threads on this forum are testimony to that simple fact - we don't know what Penguin entails, and it's certainly more complex than your suggestion, otherwise we would have seen and heard about a LOT more recovery stories.