When you do the Cretan's lab. and you are a VIP1+ and you get at least 500+ score. It gives you the option to double your rewards but it only doubles the creds and coins not the gem or token. If it's going to say x2 reward it should x2 reward since you are paying 10gems for it. So I did it twice to see if that was the case. So I'm owed 1 black and 1 purple gem + 2 tokens. Otherwise that's false information.