Real money in exchange for non-cosmetic items (weapons, characters, skills, more attempts per day on boss X or dungeon Y) is awful and must die, I do not condone it. It should be outright outlawed.
Real money in exchange for convenience (storage space in PoE) or purely cosmetic items (non-combat pets, hats, angel wings, whatever) ? Fine.
Real money in exchange for convenience (storage space in PoE) or purely cosmetic items (non-combat pets, hats, angel wings, whatever) ? Fine.