There is discussion about all this buried in PG's submissions history - I found where points and submitters stopped being shown on jobs 1380 days ago, I think it was all part of the same overhaul:
Might be time to revisit it but I think presenting them as HN content is wrong - they're not HN content, they don't get to the front page because they're good or because one of our peers thought the rest of us might like it and more of our peers agreed.
They're YC's ads shown alongside HN's content. If they weren't inserted on the front page automatically they would almost universally never get there because they're not even similar to our content - otherwise non-YC job posts would be upvoted to the front page too.
