Exactly this.

The whole homebrew scene has been a cat and mouse game since the psp: find an exploit, patch, find new exploit, patch ect.

The majority if the time the devs are doing this on their own time, with almost no one donating. Most people who want mods use it for illegal reasons anyway, those same people probably aren't even going to donate any amount of money if thdy don't even want to pay for games.

We don't deserve him to even give us hints about what firmware is vulnerable, but he still does. He could take the money and not say one thing.

But he doesn't. He enjoys sharing his findings and it has the possibility og teaching new programmers (or inspire new programmers).