what I am saying is you have to have pick up available. A SS pays single toward your pick up limit, plus single toward the SS.

Suppose I have 10:30 of pick up available. I get a two day SS worth 10:30. I get 10:30 toward the pick up limit, which I could have had by flying a WS, and another 10:30 of SS pay. So my “premium pay” is an extra 10:30. But if I WS a trip to fill up, then get a two day GS my “premium pay” is 21:00.

So if we had single leveling system, you blew your one premium trip for essentially straight pay above the pick up limit, vs. GS which could pay double above the pick up limit.