Two classic black hat approaches are large scale automated site creation, using WordPress for example, and bait and switch in all of it's forms. Spammers often don't make much per site as they run AdSense or affiliate links from poor, duplicate content sites, especially as the sites keep getting banned from the search engines, so they need thousands to make it profitable. Say they make $1 per site per week from advertising. If they only have 10 sites then they'll be forever broke. With over 1,000 sites however they're making pretty good money running an automated script from their laptop on the beach. Now imagine that they have over 10,000 sites (as they're created via scripts and content scraping and churing, so scaling isn't a problem). At the other end of the spectrum is "bait and switch", which involves creating unique, valuable content (linkbait) to build up a pages backlink popularity before switching the page over to being a sales page or similar. This can work quite well, as the url hasn't changed so many of the links to it may stay in tact, as most webmasters won't notice that it's changed therby preserving its PageRank and ranking. This works best when both the original page and the replacement one are on a simialr topic. Is this the sort of stuff you were after? SEO consultant
Great resource. however, when it comes to social bookmarking, most of the sites have a NOFOLLOW link, so it doesn't help.
hat colour is how your site is being represented to the Search engines... if it is black (or dark) your being spammy or atleast appear that way.. white means your clean and they won't deindex you
Really some good basic information and very useful to everybody planning to promote the website. thanks Anoop Kumar http://www.jazdhealthcare.com/healthtech/