So I just spent the past 4 hours analyzing the top 30 sites for: "payday loans" "buy viagra" "online sex" "louis vuitton" "seo company" I analyzed the top 30 sites per keyword instead of the top 10 as you'll have non-blackhat sites like Wikipedia etc. on the front page. I then downloaded their backlinks from MajesticSEO and Ahrefs and then analyzed them all using SEO SpyGlass (I also checked their backlinks too using SpyGlass and added these to the list). The great majority of them that have backlinks from pages (NOT domain!) that have a PR of 4 and above, all have <div id='hideMe'> in the source code where the anchor text and link is then placed. Is this a trade "secret" or what?