Yes, I tend to re-use mine once and then I send them to Cuba, where a lot of amazing musicians simply can't afford many of the basics (toothbrushes, let alone bass strings).
Not to pick, but this seems a bit flawed to me. Noble, maybe.... flawed, yes. If they can't afford a toothbrush, why would they have bought a bass guitar, an amp, and possibly even electricity to run the deal?
I'm a great driver. I can't afford a Ferarri. Please help.