(I have seen 2 different camps on the pop. One camp says to edge THRU the wake, the other says to let off your edge.)
I would say that depends on what your style is, and how you normally ride. If your style seems more flow and fluid, I would edge thru the wake. If, on the other hand you have more of an aggressive, charge style, then I would let off edge to get more pop.
And if you think about it, landing on your heelside edge on a scarecrow would just cause you to learn backwards and fall or come close to it.
Like on a toeside front roll. You want to land on your toeside edge as well.