Their comments show up as Orange to other members, I would imagine that this would boost the amount of upvotes and assume that they would never get shadow banned etc.
The fact that this comment got pretty much the most number of downvotes on my account may indicate that these posts do get attention. The fact that YC can see submitters voting history etc might also play into it.
YC founders' usernames do show up in orange to one another. This is one of two YC-specific privileges I know of (or at least remember at this late hour) on Hacker News. The other is that only YC companies are allowed to post job ads (and then only through /jobs).
For a while, it was also the case that YC founders could see a list of submissions by other YC founders. But PG got rid of that over a year ago. It turned out to have voting-ring-like effects, which was never the intent behind it.
Their comments show up as Orange to other members, I would imagine that this would boost the amount of upvotes and assume that they would never get shadow banned etc.
The fact that this comment got pretty much the most number of downvotes on my account may indicate that these posts do get attention. The fact that YC can see submitters voting history etc might also play into it.