My guess is that the payoff is more apparent with crack shoot. As long as you don't cancel into it, qcb.B gives you a 1f link into s.C. For those who aren't good with their links or plain don't know that though, the frame advantage is still very useable. It is however punishable, either with reversals or low profiling moves like d.Bs that can allow full punishes on predictable crack shoots.
I think i saw a tourney player do normal traps (other than s.B again) off of s.B. It's cool to see that there's still room to grow.