Glen Curtiss team did these to bypass the Wright Bros wing warping .
right?
The theory is nice but mechanically they are a mess.
If it were me -- I would have designed a wing with movable top bottom surfaces which could slip to form necessary contour for best lift and or bank.
Maybe someday a material will be invented which makes this goofy idea possible
Like all aircraft design - the early stuff was based on materials available and power available.
The Curtiss Flyers were never going very fast so the mechanics of the setup were possible using a pivot and wires and pulleys.
Just think what he could have done with an AO540 and molded carbon fibre---