Guys, stop trying to pressure the solver into doing anything. If you're nice, maybe he will stay and you can learn something from him.
We are all grateful for WP's post, sharing a method to securely withdraw a puzzle prize. Nobody is obligated to tip anyone just because you used MARA. You can always show your appreciation for what you've learned by directly sending a tip yourself.
Over the past few months, despite multiple tests of the reliability of MARA's service being successful in safely transferring funds from one wallet to another, people repeatedly continued to cast doubt about MARA. Everything from them having "rogue" employees to hackers having SSH backdoor access to MARA. That was all just a bunch of nonsense. MARA is a publicly traded US company, listed on the NASDAQ stock exchange, with a real board of directors, accountable to their shareholders and clients, and probably with US regulators breathing down their necks, making sure they comply with demands from the SEC, IRS, OFAC, and various law enforcement agencies. There has not been a single instance of a transaction submitted to MARA's Slipstream service being compromised in any way. So give them some credit.
Not too long ago, I used MARA to send my own bitcoin to perhaps the most compromised wallet in the universe (hex private key 0000000000000000000000000000000000000000000000000000000000000001, WIF: KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn, compressed address 1BgGZ9tcN4rm9KBzDn7KprQz87SZ26SAMH) and then successfully sent it back to myself. I even enabled RBF for both transactions. Any bitcoin that is normally sent to this address gets instantly snatched up by bots. If MARA was compromised in any way, bots would have stolen my coins. But that didn't happen.
Tx from me to address #1:
https://mempool.space/tx/bab4b7409ee1955bda0e20e6777ebc9d108a38a987f234e99b97cc0c7c97a019Tx from address #1 back to me:
https://mempool.space/tx/52a62d981c3ca21af5529eaed25599e515c2d5f26a549448e1743b966995df59