As usual those who lost ranks are complaining but we're not getting word from those who gained.... That's why these threads are always similar: folks who gained positions don't talk about it, they stay safe...
I gained notable boost in SERPs yesterday in the morning. What I've done:
I didn't exaggerate in any area of link building. Blog commenting on related niches, 10 PBN links on niche relevant websites, couple of links from directories and couple of links from Wikipedia. Sure I used some high PR spam on auto approve semi niche related sites, but not too much. I used exact match anchors on 2 of the PBN links and I made sure every article that links to my site also links to 2-4 other authority sites. I lost some of the PR juice because of that, but I rather keep it safe. My KW density is below 2% on every page.
I built all of those links slowly and I built about 50% of them on inner pages. I bought PBN links from a guy that doesn't sell them publicly.
In the future I won't use exact match anchor text for incoming links at all. If a silo structure of a website is great, surely Google recognizes all of the most important keywords you try to rank for and anchor text for inbound links doesn't matter that much at all, but it makes it easier for Google to recognize spammers.
Also, I won't buy EMD domains any more. Short and brandable domains get more clicks from search engines, but homepages are harder to rank for main KW, but that's not the point. I see more and more inner pages dominating the SERPs and that's how it should be.
Perfect silo structure, 2000+ word of content on inner pages optimized for money keywords, and perfect silo structure with exact anchor inbound links have more value in my opinion.