Positions of a few of my KWs have decreased lately and gone down to <50. It's probably due to KWs I used when buying one of the bookmarking services on this forum (used only 3 KWs; all of them were relevant to my site). I've already build a few strong BLs but I still need to increase anchor diversity (that's my guess). How do I achieve this? Would you suggest purchasing another bookmarking service (200-300 bookmarks) and target some random anchors like click here, website etc. this time? Thanks!