I reckon there is a future for it. Some computer game companies has profited from making it easy for people to mod their games so why not board games? Releasing the whole game open source would mean that people could make their own, but I doubt that'd reduce sales - I could make my own chess set but it's cheaper and easier to buy one. I'd have thought that overall it'd help a game being open source. It'd certainly eliminate problems like an expansion or promo being out of print if you could relatively easily make your own.
Completely agree. I think back to Half-Life and how long Counter Strike and other mods lived on well beyond Valve's official support for the game.