It just says "available" nothing more, nothing less.The Goal of LibriVox is to make all books in the public domain available, for free, on the internet.
I also record for the fun of it; it's fine if people listen and it's really great if I get a thank-you note, but even without either of that, I would still be recording.
Many of our readers would never have started had they known that we are doing this to please some random listener - whose taste may be fickle and erratic anyway. Nobody can please everybody, but everybody can please one person: themselves.
Mind that doesn't mean that we don't care about the quality of our recordings. Far from it! We do have our tests, we do have the requirement of "understandability". But I see this more as to give the reader a sense of accomplishment, of a job well done. If people want or don't want to listen to any of our recordings, that's up to them, not to us.