It is a decision which may have raised much controversy, since Zynga removed the 3 Fight Club related achievements, and some other loot, but specially because Zynga removed the 3 types of fighter energy refills (costing 0, 2 and 7 Reward Points), and placed just one costing 5 RP.
A few days later Zynga decided to to add back the no RP costing fighter energy refill.