Such simple forgeries are commonly sold to tourists in Mexico, the Dominican Republic, Eastern Europe, and Eastern Asia.
You are in good company if you are as skeptical about these claims as I am myself.
This highly complex mode of wing folding is one of the many examples of engineering marvels in insects that strongly suggest intelligent design.
Nature appears to be deceptive. Are Darwinists bothered by such problems? Not at all.
Outside of Darwinian fantasy land, we lack any transitional fossils to document an assumed gradual evolutionary development of characteristic pterosaur wings.