What is Steemit's daily active user count?

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Define active users? I would say users that comment or post on steemit.

Using SteemSQL, I run this query to check the amount of post (comments, resteem, post)

SELECT
  COUNT(DISTINCT author)  AS Authors
FROM
  Comments
WHERE
  created >= '2018/05/16' AND
  created < '2018/05/17'

There are 28113 authors writting post on 2018/05/16