When Randy does his first video featuring Cred, behind him to his left on the desk shelf are 4 bottle of Peppa Pig Peppermint, 2 in the pink bottle with a pig's face and 2 in a striped red bottle and no pig's face. Moments later, the 2 red bottles now are the flavor of Jungle Punch.
It makes no sense for Clyde to buy Cred at inflated prices on the black market because it is not regulated by the government. Clyde could easily buy it at regular prices from normal stores.