I think that if the creator was to come here and give us hints, this would defeat the purpose of his creation which is to measure our cracking capabilities.
Can't really be giving out hints in an experiment like this one, we must check our own leads and see what comes out of it.
Prize: 988.498 BTC (total), 31.998 BTC (won), 956.5 BTC (remaining)
His 956 BTC is relatively safe even the whole world knows the ranges where the private keys are.
I sometimes think that the creator has been withdrawing the BTC from the undisclosed wallets in recent years, I see no reason why someone who unlocks the puzzle should not share their keys anonymously once the wallet is emptied, either that or there is a possible sequence that we are not seeing.