I don't think whether comments are allowed will make a difference when there is suitable mystery/curiosity. The recent case also illustrates this: other posts in this forum or others will be spawned to try to reason an identity out.

A posting anywhere with enough specific info to prompt applicant interest will prompt other observers to fill in the details. It's true for Google, Apple, Facebook etc. – so it will be true for self-identified YC startups who tout their impressive metrics as well.