Is the implication that he made a super insecure program and left the token for his AI thing in the code as well? Or is he actually being hacked because others are coping?
AI writes shitty code that's full of security holes, and Leo here has probably taken zero steps to further secure his code. He broadcasts his AI written software and its open season for hackers.
Potentially both, but you don't really have to ask to be hacked. Just put something into the public internet and automated scanning tools will start checking your service for popular vulnerabilities.
He told them which AI he used to make the entire codebase. I'd bet it's way easier to RE the "make a full SaaS suite" prompt than it is to RE the code itself once it's compiled.
Someone probably poked around with the AI until they found a way to abuse his SaaS