Why do YC hiring posts not have comments allowed?

It's an ad, not a normal submission.

If there were comments, most of them would be shitposting about the company in question.

Because then most of us would comment on how the company in question seems to be constantly hiring and thus can't seem to hold on to employees (looking at you, Skio)

Companies like MSFT, Facebook, etc., might be perpetually hiring, but most of the YC companies whose posts we see here certainly aren't.

Because most of them are asking for senior developer and offering 150k and some equity...

I don't think many of the comments would have positive things to say.

I'm glad yCombinator was able to put together and prove the efficacy of this format and business model. Comments would threaten that and there's many other ways for one to get their point across.

"nice post" is not a useful comment.

"salary too low" is not useful.

"lol php" is not useful.

"what a dumb business model" is actually harmful.

"ceo used to work for rocket internet, what a fucking hypocrite" may be useful, but too many of these would reward personal attacks.

I can't really think of many useful comments.

You can't really comment in the who's hiring thread either,there are pretty particular rules

Can we let each company choose whether they want to allow comments for their particular post?

aside: (I like how the first top-level comments are that the posts would devolve, while the first top-level replies are that wouldn't it be beneficial in some way to have discussion...hence this post..)

Do you remember when reddit ads had comments? Pepperidge farm remembers.