I took the post you mention to mean "If you even applied to Y Combinator, you're probably awesome even if you got rejected, and we want to hire awesome people."

I took the post you mention to mean "If you even applied to Y Combinator, you're probably awesome even if you got rejected, and we want to hire awesome people." In other words, they're using "applied to YC" as a filter for their applicant pool. If anything, that seems the opposite of snobbish, since they actively reject the idea that being turned down by YC is somehow a blemish on your record. My guess is the reason they used an anonymous account is that they're not ready to do a "media launch" yet (as opposed to a product launch, which apparently they've already done). If this hypothesis is correct, using a named account might have blown their cover. This could affect their media launch; TechCrunch, for example, might not cover their media launch if they outed themselves on Hacker News as a YC-funded company.