There were probably other reasons behind the change but to preserve the meaning of the post something about this being a possible/likely violation of nyc law should IMO be added back to the post.
For those curious, the originally submitted title was "Ask HN: Why are YC companies breaking hiring laws?" and the first edit was "Ask HN: Why are YC companies hiring in NYC not posting their salary range? I've just edited it a second time, to "Ask HN: Why are YC companies in NYC posting their salary range, as law requires?". I don't think that's a very good HN title, as it makes a general claim about "YC companies in NYC" which is almost certainly both untrue and unfair. But for reasons I explained at https://news.ycombinator.com/item?id=33974170, I suppose it's ok as a tradeoff.
Edit: whoops that second edit dropped the 'not', which was obviously critical. I've replaced it with Ask HN: Why are YC companies in NYC not posting salary range, as law requires?.
Edit 2: I've changed it again in response to https://news.ycombinator.com/item?id=33976153. It's now "Ask HN: Why are some YC startups not posting salary ranges when law requires it?"
Is that the right polarity? I think the question was/should be why "aren't" they posting it. Right? Or do I totally misunderstand?
Edit: ok, fixed now.
The tyranny of the horse's ass, or rather the 60's terminal, strikes again.
(reference: the width of train tracks are rumored to be based on the width of a horse's ass, from ye olden days.)
I've edited it again with that in mind - see https://news.ycombinator.com/item?id=33976352.