If this is true (you didn't provide a source for that), I'm guessing it was one of three issues:
1. There was ambiguity in the contract, which means that the ruling would favor the party who did not draft it
2. There was negligence on the part of Microsoft, such as a failure to warn about a security breech
3. There was a violation on Microsoft's end of the contract, such as if they said they would provide security updates on a set schedule and then failed to do so.
None of these apply in this case with Disney. The T&C are very clear, there is obviously no negligence on Disney's part, and Disney has not violated their end of the bargain. Disney is simply saying that you are being given a privilege, and you may not use that privilege for commercial purposes. Not sure what about that could be taken to court.