1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. g4

Why is this variation rarely ever played? It's hard to find any information on it online, in example a refutation. MCO-14 has a side-line that resembles this, yet it is not quite the same: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 (here is where it differs) 10. O-O-O Rc8 11. Bb3 Ne5 12. g4?! b5! saying that black has immediate queen side counter play.
I know there has to be a refutation to this line, otherwise it would be played often, so I am wondering if anyone has any ideas as to what it could be.