After 5...Bxc3?! 6.cxb7 Rad8 7.Rac1 , the passed pawn outweighs the slight material deficit.
After 7...Nd5 8.Bd4 Black is worse due to his queenside weaknesses, but now he loses a pawn.
White is also under strong pressure after 2.Nxf4 Nxd4 with the double threat of 3...Rxf4 and 3...Nef5.
A strong blow on the theme of deflection, which lets Black land a knight on f3.
Before taking the pawn it makes sense to mobilize the major pieces for an attack.
8.Qh3 Nxf3+ 9.Kg2 Qf7! 10.Rac1 Rh5! 11.Qxf3 Rxh2+ 12.Kxh2 Qxf3 13.Rc2 Kh7! 14.Rg1 Rh8