Im a spin and go player, and when i filter hands with effective stack size, i noticed that when I´m in the BB and SB folds, the eff stack size is considered to be Zero.
That means that if i do something like 0-5BB filter, it includes all the times SB folded to me, even if we are 30BB deep.
and if i do something like 5-10BB, it doesnt include any hand where the SB folded to me, EVEN if the effective stack was 5-10