“free” library
Pirate library. I don't think this aspect has to be downplayed.
I can find José Saramago books there, but no info on the author himself.
You can find his biographies, criticism, analyses, the very sources that Wikipedia is using.
They don't serve the same purpose, correct. But as far "repositories of knowledge" go (the phrase that kicked off this sub-discussion), they count as such, and they are massive, I have no doubt they're bigger than WP. English Wikipedia has 7 million articles while Anna's Archive (which mirrors Libgen and a big part of Internet Archive - but far from all of it!) says it has 70 million books and 200 million articles. Cut the number in half, or even in third due to duplicates if you want, to get a more realistic number, it's still bigger.