Many people go for link purchase to improve page rank. It is considered as black hat seo and crticized by Google. Such technique is considered as manipulation of search results and a violation of Google’s quality guidelines. These guidelines are prime focus of Google’s Penguin update. It’s interesting that there seem to be exceptions to the rule, such as a directory like Best Of The Web, which has users pay for their sites to be considered for links.
Advantages and Disadvantages of EIS Advantages of EIS Easy for upper-level executives to use, extensive computer experience is not required in operations Provides timely delivery of company summary information Information that is provided is better understood Filters data for management Improves to tracking information Offers efficiency to decision makers Disadvantages of EIS System dependent Limited functionality, by design Information overload for some managers Benefits hard to quantify High implementation costs System may become slow, large, and hard to manage Need good internal processes for data management May lead to less reliable and less secure data
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