I’m a bit disappointed that no one managed to solve my homebrew encryption challenge.
I’m now offering a modest prize of $50 to the first person to solve it, and deliver the plaintext. Contest rules are in the original post.
I’m also hoping that the winner will produce a write-up of how he figured it out, but that’s not mandatory in order to win the prize money.
Fine print: I maintain sole discretion to decide who is the legitimate winner, if any, and how to transfer the money. (Probably PayPal.)