While microloans are certainly an admirable use of money; I don't think that really helps Max with his request at all. Kiva is something you do to be charitable, not something you do to make money.
The feel that I've gotten is that nobody is really making any money with Kiva. Most people I've read have gotten roughly a 1% return. Have you heard much about people having success with Kiva that exceeds a bare return on principal?
I agree, and, no, I haven't heard of people making money with Kiva, but that's (at least partly) because I haven't really heard of Kiva at all. My comment was meant to reference the success of e.g. Grameen bank which seems to get decent returns on its microloan business, but also applies a lot of local knowledge.