The amount of money they've spent on their homes in Michigan, plus the amount they've blown on their searches, makes me wonder where all of it comes from.
“Reality” tv can be very lucrative. Especially if you get producer credits. Rick and Marty are often listed as producers along with a bunch of the cast. Oak Island Tours makes money also. At $50CDN/guest for a walk around.
Advertising. Most watched non-fiction reality show on TV