tl;dr it's possible, and you don't have to rely on crawling the web searching for .onion addresses. You can instead become a HS directory authority, and pick your place in the DHT. Eventually you'd be able to get every address that goes into the DHT.
tl;dr it's possible, and you don't have to rely on crawling the web searching for .onion addresses. You can instead become a HS directory authority, and pick your place in the DHT. Eventually you'd be able to get every address that goes into the DHT.