Here's a side/meta question out of curiosity: How come HN doesn't have nearly the number of bots or lame AI commenters as Reddit or other places? Is it an ef

Here's a side/meta question out of curiosity: How come HN doesn't have nearly the number of bots or lame AI commenters as Reddit or other places? Is it an effect of the voting system? The user filtering and security steps in place? Or there's just no money in it?