Aside from Pansy, two other Death Eaters got rid of their Dark Mark, but both are too young (about Creevey's age) to have any information that might be useful to the Resistance. They will remain at Camp White with Pansy, Astoria, and Daphne until the rebels decide what to do with them. I hope they'll give them the same chance as Saunders, the very first Exit candidate, because as far as I know he's now free to go about his own tasks. What exactly these are, however, has not been revealed to me. At least he's not intended for combat yet, that's for sure, because all the fighters the Resistance educates, instructs, keeps in shape, whatever, train exclusively at Camp Black.