Surely the type of people most likely to benefit from PG's advice are some of the least likely to have the disposable income to be able to spend (up to) $500 for his time? That's 1/40th of the $20k most startups get from YC. [I don't mean to detract from the good cause being raised for here - but I think society should expect people to give back to charity/good causes/etc proportionally to their wealth - surely most…
However, you're implying the 20k$ startups get from YC represents all the value derived from being a YC startup. If I ever apply to YC, it will be for press coverage, the YC network and sound advice.