But history is interesting because it repeats itself.

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Methods of deceiving the Yandex search engine and the "deplorable" results of exploiting vulnerabilities. A systematic approach to search engine promotion for effective and legal growth of a site's positions.

Such situations have occurred repeatedly and, it would seem, should have forced companies involved in website promotion, including those declaring themselves as leaders in search engine promotion, to stop looking for vulnerabilities in search engine algorithms and start developing their clients’ websites.
Only the costa rica consumer email list vulnerabilities and the tools used to exploit them change. In order not to interrupt the whole story, let's recall the most illustrative moments.

2005 — Yandex algorithm made the use of automatic link exchange scripts useless (after a period of manual ban) and penalized sites found to be deceiving the search engine. Many resources that trusted optimizers using such a scheme suffered. The positions of sites promoted in this way dropped very seriously, and site owners unexpectedly had to look for other ways to attract customers.

2007 — after the emergence of link exchanges and due to the fact that SEO companies began to promote sites by thoughtless conveyor-belt purchase of links, creating a regular budget race in the TOP-10, Yandex stopped taking into account links from sites that earn money by selling links. Some sites selling links were pessimized. Thus, clients again responded with their income for the dishonesty of SEO companies.

And again 2007. The race to the TOP-10 now continues with the help of conveyor-belt placement of links on other sites due to vulnerabilities found in them (for example, in the site search). Moreover, the owners of the sites on which such links were placed did not even guess about it. And, as always, well-known SEO companies reduced their costs in this way, and clients were again thrown on rusty nails.