If you look at the transactions in wallet 66, and a few others, you will see that it appears to be something automated, sending small transactions with numbers that I believe might provide some clues in decimal/hexadecimal or binary code as to where the private key could be located. However, this is just an assumption.

But it seems to be something automated by the puzzle's creator itself, I looked at some transactions.

I have a small curiosity about these occasional small incoming transactions in wallet 66. Could they be some clue about the key's location, or is it just something random?

Why is there a notice on the website stating, 'Note: 2000000-2050000 (First ~%0.98) ranges and 3FAF000-3FFFFFF (Last ~%0.98) manually defeated in this pool'?

Who ensures that the address is not within these ranges?