- Social bookmarks helped boost one of my sites from #8 to #1.
- Tiered link building was the way to go
- Only that 1 site that I used Social bookmarks on was hit by the update. All of my other sites that I have, that I didn't use Social bookmarks on, stayed neutral in their positioning.
- Tiered link building did not cause SERP drops.
Don't do direct Social bookmarks to your money site. Tiered link building (Link Pyramids) seem to be working great still.