The quest that you receive after choosing to side with the Vanguard instead of the Drifter has a step that requires banking 50 motes in Gambit or in Gambit Prime. After getting this quest step, I played some Gambit and banked close to 50 motes. Then I checked my progress for the step and was surprised to find that it shows that I have banked zero motes. This is preventing me from being able to finish the quest. I banked the motes in classic Gambit because it said either would work. I have not tried to bank motes in Gambit Prime to see if that would give me credit because I do not like Gambit Prime. It just depresses me and makes me miss the feeling of playing as a powerful guardian with powerful weapons instead of a guardian that is incapable of doing anything without a whole team beside them because the guns are so weak they do almost no damage.