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I am wondering how the yelp spam detection system detects paid reviews? By paid, I mean the following scenarios:

  1. I as a business owner pay people to write positive comments and give me a good rate
  2. I as a business owner pay people to write negative comments against my opponent businesses.

I appreciate any technical response and also the introduction of good resources. Thanks in advance.

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    $\begingroup$ Maybe the system looks deeper into the user's profile. If the user's comments are more frequent on a specific company. Instead of giving a different comment, he/she is always targetting a specific company in the comment. $\endgroup$
    – Shubham Panchal
    Mar 15, 2020 at 8:21

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