Comment by zamadatix

They will never claim the prize for any Millennium Prize problems because the blowback for asking for the prize would be 10x worse than anything they've received about the proof efforts so far. This leads to the joke about the Clay Institute continuing to be on track to never having to pay out the prize money (after the previous drama of the first problem fully solved by humans resulting in the same).

As a result, I also doubt they'll ever bother to submit these to a journal when they already have the attention and ongoing review of leading mathematicians from around the world.

Perhaps the most salient part of the Millenium puzzles though is the 2 year acceptance period, where we give a time for that review and consensus (the part that matters, not journals or prize claims) to settle before claiming it solved.