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It is known that Google punishes sites that show content only visible by
the Google Crawler, and invisible for normal visitors.

Imagine a site that needs users to login to view the content, and also
makes the content visible to the Google crawler (without login). Is this
site going to be punished?

After all, the content IS visible, although it's only accessible for
users who are logged in.

Webmasterworld is an example of such a site. They score very high for
some keywords, due to their forum, but it's only accessible if you log in.

(e.g. =)

Does anyone knows if this is allowed by search engines or it's just a
matter of time before such sites are punished?


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