In a wider perspective givers profit for sure, because any Euro or Dollar good invested in – for example – Africa, ist also an investment in Europe or America, in a global-society view as well as economical. People become – even if first very peripheral – productive participants of the economical circle.
GlobalSpring will basically permanent recommend donations or free of interest loans. But in a longer run it may be possible, to lend with a smaller interest rate, means somebody may be do something good and gain at the same time, but this would have to be organized in a way where no additional costs for lenders would be created. But well – thats a real challenge!
In fact it should not be your first intention to make a good business. For us microfinance is a amazing good way of foreign aid, because it is very effective, requiring thinking and doing in the most economical way, coaching mini- and micro-entrepreneurs to do so. Its simple - money dont get loss, but can become useful for other people after it helped the one before.