Earlier quoted context omitted.
They used the official MIT-licensed dataset published by Y Combinator on BigQuery, so it’s not necessarily fair to blame OP here.
“This is not relevant to your point but I want to say that's an entirely third party project and we didn't even know about it for a long time. We don't publish data to them except in the sense that we publish it to everybody: https://github.com/HackerNews/API . I think their page gives a misleading impression that the project is somehow official, when it's not ( https://news.ycombinator.com/item?id=43850991 ).” --dan…
Thanks, good to know. Their page on BigQuery is very misleading.