Hello, thanks for your comment.

So far it has not been detected that any company uses Fiat money to buy Steem, but there have been several entrepreneurs who have sold products accepting Steem Dollars or Steem.

Regarding the following question, the first 7 positions in the green zone are the businesses that have made PowerUp with more than 50% of the rewards obtained in the last 30 days.

I will take your suggestion and locate the green zone from 50% of the rewards obtained, to try to further motivate the increase in SP.

Once again, thank you for following the work of the community.