Well, HN isn't a scarce item in one sense, namely, anybody with a computer can access it from anywhere on the planet (except perhaps North Korea).
But HN is a scarce item in another sense. If I wanted to make another one, I'd have to not only code it up, but also attract the readers that HN currently has. That would be difficult.
But HN is a scarce item in another sense. If I wanted to make another one, I'd have to not only code it up, but also attract the readers that HN currently has. That would be difficult.