It’s hard to say. The compiler is in a state that isn’t useful for anything at all and it’s 100k lines of code for something that could probably be 10k-20k.

But even assuming it was somehow a useful piece of software that you’d want to pay for, the creator setup a test harness to use gcc as an oracle. So it has an oracle for every possible input and output. Plus there are thousands of C compilers in its training set.

If you are in a position where you are trying to reverse engineer an exact copy of something that already exists (maybe in another language) and you can’t just fork that thing then maybe a better version of this process could be useful. But that’s a very narrow use case.