Bethesda recently announced a Deluxe Edition for RAGE 2, and one of the perks that they confirmed purchasers would be receiving were Progress Boosters and in-game cheat codes. Their inclusion in this fashion led some to assume that these were options that would be purchasable in-game through microtransactions for all other players
Source: N4G PC RAGE 2s Progress Boosters and Cheat Codes Wont Be Sold For Real Money, Bethesda Confirms