Does HackerNews have an Official policy for promoting YC Companies?

Please refer entry dated: 12 May 2011 "New Jobs Code" in below link. http://ycombinator.com/newsnews.html

It doesn't say anything specific about ad from YC companies though.

I noticed a few minutes ago that Loopt had a post on the front page, but it didn't have any points nor did it have a submitter.

See the screenshot [link] for reference.

They let YC companies advertise hiring like that.

Ah, ok. Is this an "official" thing that's been communicated by PG, or just something that is understood because it happens alot?

He made it like that a couple months ago, they used to be regular submissions but with optional comments and then he did something to boost their presence. You'd have to search to find any mention of it but it was official.

Ah nice, I think this algorithm is fair:

"Now instead of being ranked by points, jobs simply start at position 4 and slide down the page at 4 positions per hour. To prevent the frontpage from being overloaded with jobs, no one can post a new job when there is still one in the top half of the page."