A business is "Ramen profitable" if the profits are just barely enough to cover the founders' living expenses, provided the founder is willing to live a very meager existence, eating nothing but "instant noodles" (a very cheap staple food). The essay on the topic where mega-rich Paul Graham gives advice to would-be entrepeneurs about the cheapest foodstuffs is a classic in the first-against-the-wall-when-the-revolution-arrives genre.
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