In early July I experimented with link development. I pick a niche where the #1 position is a page with 13 backlinks, I've checked them none higher than PR2 backlinks I made a blogspot blog, with optimized URL and keywords for that niche. In a week I got into #15 position, then I make dozens of new backlinks, until I got 94 backlinks, lots of them with 3 and 4 PR backlinks, with relevant topics and anchor text. Then suddenly my blog is thrown into #70 position What did I do wrong? How to recover my initial SERP position?
Building links too fast can result in a drop in the SERPs. Basically, Google thinks your site might be using spammy techniques and doesn't let you increase your ranking. With those backlinks that you built, did you vary the anchor text or use the same anchor text in each link? That can be an issue.
Yes, I use 4 anchor texts... Is my blog cursed for good and never reach top 20 position for eternity?
It maybe your blog is new, according to my experience a new blog or sites will ranked within a few days or weeks after that it will slowly down your rank if you are using a fast link building techniques. Yes, a fast link building may get you penalized, google will considered it as a spam. Do it slowly but surely effective.