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Also for the boolean flag - I just meant there's a column noting whether a user is active or inactive. "In most computer programming languages, a Boolean data type is a data type with only two possible values: true or false. " :)

Hmm, but the numbers they usually report in those daily Steem statistics as far as active users go are mostly correct right?

Here you can see the amount of active users. It just takes the amount of users that have commented, voted or posted during a month.
https://steemit.com/statistics/@arcange/steemit-statistics-20180120-en