The psychology behind it is amazing. You get lucky with 20 or 40 orbs and it just makes you want to pull more. Easy to stop if you were F2P because you have no choice. Otherwise you want to pull more. On the other hand you get your pity rate up high and you don't want to squander it. So you don't pull anything good and it just makes you want to pull more.
Still no Vantage or Deathblow inherits. Disgusting.
Still no Vantage or Deathblow inherits. Disgusting.