As soon as they start a business, they want to be able to open up a savings account with you. They want to be able to make easy payments. They want to be able to receive money from relatives who might have gone to some distant city or country.
And you have to offer the whole package deal. Although I do think microcredit continues to be the crown jewel of microfinance. But people don't just wear jewelry. They also like to wear clothes, also undergarments perhaps.