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FB does sort comments by “relevance” now by default which might be related to likes on the comments, but who knows.

• mipmap04 8y ago
  They are also piloting comment voting.
  • username223 8y ago
    I'm not in the social space, but I assume that "piloting" has a specific technical meaning. My guess is "altering to maximize engagement and/or revenue."
    • pier25 8y ago
      Not sure, but I imagine it means testing on a small percentage of users.