some see these SBD pumps as good, but it's really not.
it is what prevents SBD from being used as a serious alternative to Tether, Nubits, BitUSD etc.
A "reverse converse" solution was proposed by @timcliff but seems it fell on dead years
https://steemit.com/sbd/@timcliff/saving-sbd-proposal-to-restore-the-usd1-usd-usd1-sbd-peg
SBD could have taken better advantage of the Tether debacle, instead it showed again it can't hold the dollar peg.