https://techcrunch.com/2014/08/13/backpack-connects-you-with...
https://techcrunch.com/2016/01/28/shypmate-pays-travelers-to...
That's interesting. I never thought of it that way. Solutions to the "Amazon doesn't deliver here" problem are quite popular in Ghana. Asking someone returning to get you something is quite common. I have friends who've created businesses around this.