I fucking hate that keto sub.  I checked it out once, and the cognitive dissonance was insane.  You'll get booted/mocked for questioning the diet, but the main flaw is it's almost impossible to sustain.  Those people still eat way too much food, and that diet is poison when you (inevitably, for most of them) re-introduce carbs into your diet.  CICO is a dirty word there.  Fuck em.