Prevent msn updating
As a result of this change, the usage of nofollow leads to evaporation of pagerank of outgoing normal links as they started counting total links while calculating page rank.The new system divides page rank by total number of out going links irrespective of nofollow or follow links, but passes the page rank only through follow or normal links.
Additions and improvements were made throughout the website's first years.
Other websites like Slashdot, with high user participation, add only for potentially misbehaving users.
Potential spammers posing as users can be determined through various heuristics like age of registered account and other factors.
This functionality was used on pages that are not considered to be part of the actual encyclopedia, such as discussion pages, user pages and resources for editors.
However, the various interwiki templates and shortcuts that link to other Wikimedia Foundation projects and many external wikis such as Wikia are not affected by this policy.
The site's main function was to let users discover, share and recommend web content.