Nope, I don't care about your email. Just a way for you to track progress, contribute to leaderboards, get achievements, and be able to reset your password if you forget it. The end-goal was originally just for me to have an ad-free place for me to play my favorite puzzle games and I shared it with HN. I do ask for a couple bucks after a solver finishes 25 of every puzzle + difficulty just to help out with server costs. But I don't dream that I'll even break even on this.
I'm a software engineer for my job and just code apps for a fun hobby in my spare time. Pretty much, most every software engineer uses agentic AI coding tools these days. I built this the same way I build software for my job. So it's not some slop codebase with API keys sitting in the HTML :)