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The don't promise ROI those are for the investors what they do promise is the amount of vote value. STU=Steem token unit the # you see. Say a bot promise 210% return on bot-those are vote seller. Vote seller do this: Send 0.1 sbd you get 0.21 sbd. Sbd are pegged to the usd so even if the sbd price is high the amount is counted the same. Please use voting bots to promote you post

are you the owner of tipu. If yes can I chat business with you privately?

no the owner of tipu is @cardboard