After reading this HN post in the morning, I've received one of those SPF ~all beg bounties via email today. It ends with: From: whiteboxtesting01@gmail.com >

After reading this HN post in the morning, I've received one of those SPF ~all beg bounties via email today. It ends with: From: whiteboxtesting01@gmail.com > Waiting for your response and hoping for a bounty reward for responsibly disclosing this issue to your website. Furthermore, I may attempt to contact you again if I do not receive a response to ensure that my message has reached you.