You are making the mistake in assuming that the SBD payout is the same in all 3 scenarios...it is not. At 0.25 the SBD payout is 0.75 x 0.25 = 0.1875, at 1.00 it is 0.75 x 1 = 0.75 and at 3.00 it is 0.75 x 3 = 2.25.
Also, why are you making a conversion of the author SP payout using the median price? The system doesn't do that. In all 3 cases the SP portion would be 0.75.
RE: [ENG]The psychology of investors applied to Steem. // [ITA] La psicologia dell'investitore applicata a Steem.