75% of Google's Blogspot Blogs are Spam

Mar 20, 2007 • 9:43 am | comments (21) by | Filed Under Search & Web SEO Spam

On a recurring theme of Internet spam, a study discussed in WebmasterWorld indicates that three out of four blogs -- or 75% -- are spam.

According to the study (PDF link):

...14 of the top-15 doorway domains have a spam percentage higher than 74%; that is, 3 out of 4 unique URLs on these domains (that appeared in our search results) were detected as spam. To demonstrate the need for scrutinizing these sites, we scanned the top-1000 results from two queries – “site:blogspot.com phentermine” and “site:hometown.aol.com ringtone” – and identified more than half of the URLs as spam easily.

Here is a chart from the study showing the "top doorway domains and their spam percentages (among the search results in our data)": top doorway domains and their spam %

The reason for this is the suspicion that the popular blogging service is free. One WebmasterWorld member states:

The trouble is, there's no algorithm that can automatically factor in the price of a service. It's free to set up a blog on Blogger, so it can be abused more easily. If these spammers actually had to pay for a new domain name every time they set up a splog, they wouldn't bother.

Other findings of this research showed the spam percentages for Top-Level Domains (TLDs):

  • 68% of .info TLDs are spam
  • 53% of .biz TLDs are spam
  • 12% of .net TLDs are spam
  • 11% of .org TLDs are spam
  • 4.1% of .com TLDs are spam

Forum discussion continues at WebmasterWorld.

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