From a previous reply to a person who made a similar comment: [quote]Keeping the Marks for Materials & returning the Materials for Mark exchange (without rep or glimmer) would give you: 1:2 marks for materials + 10:1 materials for marks = 5:1 Mark for Mark Since each mark you gain adds to your 100 weekly cap, yet the ones you spend do not subtract from it, you would have to earn the weekly max of one mark for just 20 of the other. Which would leave you unable to gain anymore of the maxed type for the rest of the week if you decided to swap them. That's a pretty steep cost. Especially once you concider that marks aren't shared across an account like glimmer & they can't be traded between characters like materials.[/quote]