Hipsters are a subculture of American consumer for whom the idea behind the marketing holds more value than the product being marketed.
The attachment of certain words, phrases or ideas to a product (e.g.; counter-culture, independent or "indie", progressive, alternative or "alt", organic, holistic, "old-school", etc.) whether that product is music, fashion, technology, food, social media or real estate, is enough to connote to the hipster "authenticity" and value, regardless of whether there is any innate value to be found.
Ironically, the hipster perceives him/herself as the counterpoint to mass-culture and conformity when, in fact the ease with which hipster "culture" can be appropriated, repackaged and marketed makes them the ultimate conformists (e.g.; tattoos were once a sign of rebellion and a badge of one's outsider status, now over 40% of all Americans under 50 have a tattoo, essentially making them all members of the same tribe.)
Definition #1 was clearly written by a hipster.
Gay porn used to feature nothing but hairless meth-addled circuit queens, now we have to watch skinny, bearded hipsters get facials.
Befuddled observer: "It's 79 degrees out, why are you wearing a kitted wool cap?"
Hipster: "Because I reject the mainstream banality of weather in favor of an authentic expression of my inner self."
Befuddled observer: "Oh, I thought it was because you're a hipster douche-bag."