When I say we moderate HN less, not more, when YC or YC startups are involved, the word "moderate" means all of the above: boosting submissions, downweighting submissions, intervening in comments, and so on. When I said we didn't touch this post, I meant we did nothing to affect its rank.

There's an important thing to add, though. "Less" does not mean zero. We still moderate—we just do it less. Mainly we try to be consistent with how we moderate other submissions, in order to be fair. In this case, for example, I just reduced the effect that flags are having in driving this post down the front page. But I reduced it by less than I would have if the post were non-YC-related. If that sounds scandalous, please re-read the previous sentence.

it means they are less likely to intervene in the discussions on them.

I noticed one dubious upvote making it past HN's anti-voting-ring software, but that's not enough to push a story onto the front page, let alone to #1. It's also extremely common. I didn't notice evidence of any "network for upvotes".