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Whoops, It's disappeared :(
UPD: now back again

Guess it's related on how many upvotes your comments receive. Bots have rep in the -5 already - they get flagged/downvoted constantly. I think this is a very effective way of getting rid of the bots. (If negative rep means no payment.)

I honestly have no clue. I'm guessing that is for the amount of activity you do on Steemit. Or maybe it might be calculated from your SteemPower?

Compare @sulev's and @cryptos's Steem Power. But they have same reputation.

i was just wondering the exact same thing, I guess its just another genius feature. :)

It is some sort of rating, but we should wait to read what is the meaning behind the numbers when the update to steemit.com is successfully pushed.

Here is the official update on the new reputation ratings: https://steemit.com/steemit/@dantheman/brief-update-on-reputation-score