What was he replying to?

He was replying to a tweet by Paul Graham where Paul Graham says the following:

“Startups: Instead of appearing on Shark Tank, spend that energy fixing whatever makes your product so unappealing you think you need to.“

	▲	PgThePedo a day ago \| parent [-]
		Says the founder of YC who makes nothing people want. YC funded Flock. You want that?