¿Qué pensarías si te digo que la generación de leads comenzó hace 6,000 años en Mesopotamia?. Increíble ¿No? Pues durante ese tiempo la tribu Mesopotamica inventó una forma de intercambiar bienes y servicios mediante el intercambio de té, especias, alimentos, armas e incluso cráneos humanos. Esto se denominó más tarde sistema de trueque. El dinero no existía entonces. Pero incluso después de que nació el dinero, el sistema de trueque no murió.
As search engines have become more prominent, some affiliate marketers have shifted from sending e-mail spam to creating automatically generated web pages that often contain product data feeds provided by merchants. The goal of such web pages is to manipulate the relevancy or prominence of resources indexed by a search engine, also known as spamdexing. Each page can be targeted to a different niche market through the use of specific keywords, with the result being a skewed form of search engine optimization.
Spam is the biggest threat to organic search engines, whose goal is to provide quality search results for keywords or phrases entered by their users. Google's PageRank algorithm update ("BigDaddy") in February 2006—the final stage of Google's major update ("Jagger") that began in mid-summer 2005—specifically targeted spamdexing with great success. This update thus enabled Google to remove a large amount of mostly computer-generated duplicate content from its index.[33]