Yeah well my point is Andzhig is that the key/clue/pattern may lie within the private keys and we need to look at past addresses, follow that pattern, and narrow down the search.

The creator of this "puzzle" already posted in this thread, said that the pk's used increasing bits but were otherwise random, and then proved it was him by saying he would increase the balance on the addresses 10x and then did just that. So don't waste your time looking for patterns, this "puzzle" is just intended to check on the progress of brute-force pk guessing.