Is it time to take bets on whether MW would lose a case at judge.me or in RL court? I don't gamble but I am confident he would lose his argument in a RL court and likely at judge.me.

His mistake was accepting and agreeing to renegotiation of his initial offer. His initial offer as I see was simply a request, not a requirement...

To make your bets easier to read, please stick to the following format:

When a party declined his request to follow a specific format and submitted an alternate format he should never agreed to that alternate format. By agreeing to the alternate format he vitiated his original offer. Whether "that" address was in his previous offer is moot. "that" address becomes the agreed upon submission.

I believe that any submission where he specifically accepted or agreed, he would be liable for the terms, if this matter went to a court. He would additionally be liable for any arbitrary conditions placed in the "Optional comment" section of the submission.

IMHO