Exactly that, the whole stomping thing is entirely for show. They're gone now because now is egg-laying season, if anyone actually cared to stop the lanternflies they'd start by putting sticky traps covered in chicken wire mesh on every tree of heaven in the metro area. They're mapped so why not start there? Or better yet, put a slow-killing herbicide (the one time glyphosate is good) into cuts on each tree AND wrap with sticky traps (e: in the spring when the eggs hatch), that way you get rid of nymphs and the host tree in one. The host tree is invasive and better to just plant a fast-growing native or another gingko.

Anything else is just false advertising and you might as well kiss Northeastern grape, apple, and stone-fruit production goodbye in the next ten years.