Well, it's like I told my wife about any of these TV shows that are investigating classic mysteries like Bigfoot, and others. If someone found conclusive, tangible proof, you'd hear about it in the news. Not saying its' all BS or anything. Just saying that if someone captured a live bigfoot, or if the Oak Island folks found treasure, you'd hear about it even if you weren't following one of the shows.
That said, it leads me to believe that they haven't filmed an episode yet that turned up any treasure, unless everyone on the show signed the mother of all non-disclosure agreements.