Not Getting Trapped Into Participating in a Link-Exchange Scheme
Some link-exchange schemes designed to spam search engines are so obvious it's almost impossible for someone to buy into them inadvertently. Link farms that advertise they will put your link on hundreds or thousands of sites instantly are one, sites that "guarantee" you a top ten return position on major search engines are another.
Both those scams are so obviously "too good to be true" that they're easy to spot and avoid. Other scams that operate on the wrong side of the search-engine guidelines are more subtle and need to be tested for legitimacy.
Fortunately, the "test" is simple, just ask yourself if the links being offered are traditional editor-based links or "full-duplex." Editor-based link management programs like LinksManager require that you manually approve every link added to your site. Full-duplex schemes allow links to be solicited and added automatically and are a violation of every major search engine's guidelines.
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