I think this is really good use case. Is it limited to the sports ticket only? How its going to figure out if the tickets are non transferrable? Does it work with the venue/vendor to confirm the transaction?
Well, if they follow St*bhub's model, they would probably just refund any claim of problem by the buyer and take that out of the seller... even if the seller did nothing wrong and the buyer is trying to defraud.
e.g. claimed denial-at-door (even if because of misuse by the buyer) , claimed somebody else in the seats, etc. They refund without requiring proof of problem partially because they know you can dispute with your credit card issuer anyway, and that's a difficult case for them to prevail on.