I have no doubt it happens all the time. It's common practice for "grey hat" SEO... | Hacker News

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chocococo on Feb 27, 2011 | parent | context | favorite | on: How Demand Media Used PR Spin to Have Google Kill ...

I have no doubt it happens all the time.

It's common practice for "grey hat" SEOs to test on a competitor site first, before using it on their own site.

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