The way I see that is that say you have a SR of 30% (on average) then from any 100 selections (on average) you will have 30 winners, and then following those 30 winners the next bet will also have 30% SR (on av erage), so in other words 9 times. (from 30 that is)

i.e. the 30% SR does not alter on ANY given selection regardless of whether the previous one won or not.