Charge customers that arrive with prototypes more, than those without prototypes.
Discussion
You can choose to ignore the prototype completely, yet the prototype still helps express what kind of an app the customer wants built, probably more than their vague descriptions ever could.
Yeah, I know, that's the problem. As we say in Germany, "They have no clue, but lots and lots of that."
Impossible to get them to rethink the design, workflows, tech stack, architecture, data structure, anything. We're just supposed to take their pig and slap some lipstick on it.
I'm totally traumatized. LOL