This is in the form of a question because this New York Post article, while raising a potentially interesting question, provides little in the way of context with which we can answer it:
According to a person with knowledge of the situation, the Mets charged Yankees family members $250 for last night’s Subway Series game. The fact the Mets charged the Braves $80 per seat Friday, Saturday and Sunday angered the Yankees, who host the Mets tomorrow and Thursday night.
On the surface it does sound like a bit of a price hike. But were the seats in the same place? Are weeknight tickets different than weekday? Are Yankees games on a different price tier than Braves games?
Maybe that doesn’t account for a 3x+ price hike, but I’d be curious to know more before I started making up clever tabloidy headlines about it.