https://btcpuzzle.info/puzzle/67It's hard to believe that Puzzle 67 was opened by simple enthusiasts and not by the creators themselves, since the pool was often attacked by DDOS and 6,69% of the range was already passed, and since the creators of the puzzles know the private key, they can easily monitor how close the pool participants got, so they could easily take their coins themselves under the guise of someone finding them, so this is most likely a scam than some kind of honest competition. Who wants to give strangers more than half a million dollars, it's unrealistic! Let's think about it. Does anyone doubt that this is how things are or do you think everything is honest?