Honestly, I’d just watch a reality TV show about them scrambling to make that money after they’re proven wrong. It’s a win-win.
And although it seems like the flat-earth movement is a recent phenomenon, people have been pushing this idea for a long, long time. Just look at this map from 1893 entitled, “The Square and Stationary Earth.”
When that map came out, people had already been going around and around the world for hundreds of years.
One of the silliest aspects of the entire flat-Earth fiasco is the amount of artwork and “renderings” people have been disseminating as early as 1806 – which is how far back the “Flat Earth Society” dates back, officially speaking.