Interesting to see YC's increasing excellence in estimating the right candidates vs increasingly number of 'How to' tutorials to influence or hack the YC selection. I'm curious whether YC is observing an applicants-getting-better effect in interviews.
You could also say that the increasing number of YC graduates is increasing the number of 'How to get into YC' guides. Also, these are not hacks they're just shedding more light on what the YC is looking for.