We have only the OP's word that this is actually what happened, and there's no way they could know that. The author also admits to having leaked their Discord key and accidentally leaving the GitHub repository public; their technical competence is in question here. It almost reads like a creative writing assignment. How would anyone have known he was about to register the domain?

I'm sure this did happen but given the followup post (https://kill-saas.com/posts/from-0-to-5) it seems like the author is mostly playing up the experience as a way to advertise his product. Mentioning the vibe coding, the Discord key, and leaving the GitHub repository public feels a little like this might be clickbait.