The traditional microfinance has been a mess because it creates a lot of over powerful institutions and the usurious rates don't necessarily make lives in Africa better.
The GiveDirectly's direct handout model can be easily abused on the borrower side.
Zidisha bridges the gap between the two with technology. I think it's great disruption.
I do think the international aid microloans need to be subsidized so their rate is affordable but it's good for borrowers. I think even American small business loans need to be subsidized too. It would be very expensive if you make everything determined by market forces. That's why OnDeck and Kabbage get away with their 50% APR loans. But I think it's bad for the small businesses and bad for the economy.