GCI doesn't actually pay either group. They pay the kids they hire minimum wage (or sometimes less, allegedly) while expecting them to work criminal fucking hours collecting donations. And then, once those donations are amassed, they rarely manage to find their way to the nonprofit they were collected for because, as a for-profit business, GCI is just better at screwing people over than a nonprofit ever will be.
How do they get away with it? Because it's all done in the name of activism. They know they can make people work long hours ("Saving the world is hard work. Aren't you tough enough? Aren't you devoted enough?") and they know they don't technically have to pay their new employees a living wage ("You didn't get into this business for the money, did you? Don't you know that money corrupts everything it touches?"). Most of their employees are working off the vague, directionless guilt that comes with getting a liberal arts degree, so they're pretty much begging to be roped in and abused for what they were told was a good cause -- basically, they want to be the submissive in a BDSM relationship of finance.
The satisfied look of a woman who can't even make the minimum payments on her student loans.
These guys offered me a job at one point, and through a weird combination of luck and cowardice, I just barely managed to escape their seductive snares. Also, I googled their name, and at the time it auto-completed to "scam." That sorta tipped me off.