FYI, kiva is a scam (in as much as the company is incompetent) that primarily props up predatory lenders in other countries
I'll go with the former.
http://en.wikipedia.org/wiki/Kiva_(organization)#Current_int...
If you're making more than a percent or two interest in what you believe is warm-fuzzy charitable lending, you're simply deluded. Almost all of these enjoy double digit interest rate yields... that's after losses for defaults. Most are around 30% some over 80%. It is very obviously a morally bankrupt practice which has managed to clothe itself as a charity.