>>Softwa+Hy
Launch HNs and job ads are 2 of the 3 things that HN gives back to YC in exchange for funding it (the third one is orange usernames for YC alums). This is explained in the FAQ:
https://news.ycombinator.com/newsfaq.html#yc. I've also posted about it many times, as you can see from links like
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que....