It's sustainable because the amount of money that's life changing to people in the poorer parts of the world are a moderate purchase to people in the richer parts. Additionally the benefits last way longer than just the initial purchases made with the money, by giving it directly to people instead of giving them things it's injecting cash into the local economy where it circulates multiple times going through multiple people's hands. There's studies showing this kind of direct giving and the economic activity it generates is effective at improving people's lives. The goal of GiveDirectly is charitable after all so they're not trying to extract value from the population.
> And who wants free money?
Are you trying to say people won't accept free money?
> And who wants free money?
Are you trying to say people won't accept free money?