FWIW back when I played cashed games online consistently on merge (I've sort of given up on trying to make money playing online in USA for time being) my non showdown winnings was always very high, what fluctuated was my showdown winnings, they would range anywhere from slight losses to big winnings. But the way I looked at it was you can consistently have big non showdown winnings whether or not you're running good. But you gotta be getting cards/making hands to get those showdown winnings. So by taking a more lag approach I'm almost smoothing out my variance.
kinda
showdown winnings are free money hands. everyone should be making money at showdown. this is coolering, valuebetting, knowing when to fold and knowing when youre correct to make that call OTR for the
odds that you are getting. the amount you win at showdown will vary, but everyone should be making money here. if not, they have serious leaks.
non SD winnings are a direct representation of how much of a station you are preflop/flop/turn and your attempts at
bluffing. if oyu put lots of money in pre and then fold lots post, these will plummet (just look at my graphs
). conversely, the better you are at picking good spots to bluff, the more these will go up. but yes at ovito mentioned, the fact that blinds exist will push this line down naturally