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I dont understand the logic, what witnesses do? raising or lowering the interest for sbd? who pays for that? the witnesses ? is it like raising the dividends to make steem share more atractive?
I mean, is that the only tool to try to maintain the sbd within the expected range of price ?

btw, voted and followed !

They can raise the interest rate that the system pays you for holding Steem Dollars. This encourages people to hang on to their dollars and not just dump them.