I have more and more doubts that some geniuses are solving the puzzle. In my opinion, starting from the 120bit solution, the creator does all this. To keep the interest in his mystery alive. If you compare the sequence of events (dates of decisions, increase in the prize), then everything adds up to a logical picture. Now it is more profitable to use computing power for the inference of neural networks, for their training, rather than for searching for a needle in a haystack with an unknown result. And here you need very large computing power, which will cost a lot to rent.