it makes no money from it, other than the ability to massively ramp up the cost of sets like these
With Doubling Season in play, Planeswalkers will enter the battlefield with double the normal amount of loyalty counters, and the curve is perfect: turn 5 Doubling Season, turn 6 play Teferi, Temporal Archmage, which will enter the battlefield with double the loyalty, and you can instantly get your emblem, which will stick around until the end of the game and just make things silly
Roger the Pirate King and previous owner of the fabled One Piece treasure
Cards like Atraxa, Grand Unifier, Tarmogoyf, Reconstruct History, and Nethergoyf increase in effectiveness the more card types you have access to, so including a few sorceries helps unlock these cards fullest potentials
How to Spot a SAR on a Card Four visual checks, any one of which is usually sufficient to identify a SAR: Card number past the base set total