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In my calculation, they r giving 10% return ((.11-.10) /.1)×100. My number match steem supply calculation

Well if you cut of the digits then 0.118 becomes 0.11

Its actually .1066. I rounded it up. So actual return is 6.6%

Also my numbers r little more generous. It would be less than 10%

Is @minnowbooster just a club for rich people now? No one else is allowed to be part of it and now the people with money get to keep making more money?

How did you get that assumption?