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+10% as stated in the post :)

always 10% or 10 to 20%??

Currently always 10% but I will monitor the demand and implement dynamic ROI probably :)

Aaand its dynamic now :)

nice. With just 10% , tipu are looking a normal bid bot!!!! With dynamic, how much ROI will give in a upvote??? About 15%??? More or less?

Depending on how much unused VP @tipu has, its from 10% to 30%. Please check @tipu blog to see current upvote profit :)