There is a program called OCTGN (pronounced octagon). It's a generic program, but it let's people across the world play cards together. You can upload any cards to the thing, and play the cards according to the rules of the game. OCTGN doesn't know the rules, it just deals cards from piles if you ask it too. If someone wanted to put Crossfire on there, would that person get sued to oblivion?
Some companies have taken a laissez faire attitude to the thing-Fantasy Flight Doesn't care as long as people are buying the Lord of the Rings LCG. Some hate the thing like the plague-(looking at you WotC).
Is this a thing the online community can or should be able to build around?