I realize that this is pretty much his site, and he makes the rules, but does that mean that we should all be hitting that little up arrow next to his name out of gratitude? Honestly, I don't think that he probably checks on the number of upvotes we have given him when looking at yc applications. Although, he may have some sweet filter algorithm that automatically takes that into account...
Also, users of this community likely want to read pg's comments, and upvoting is the surest way to get them noticed.
My comment started out at -1, got voted up to 5ish or so, and after pg made his comment, got voted down again (not that I particularly care). He certainly does have a lot of influence, but that's not a bad thing - I think many of us arrived here because we like his writing and what he's done with this site.