Note that most borrowers offer interest well above 5%, and lenders are free to fund the loans at or below the offered rate. In my experience, many lenders have opted to fund at low or even zero interest because they wish to offer their selected entrepreneurs low-cost loans, rather than make a profit. The rate paid by the entrepreneur is more important to them than their own rate of return.
We don't interfere in our users' interest rate decisions, other than to limit the maximum interest to no more than 25%. Our platform accommodates all lending philosophies, from those who do not believe in charging interest to those who believe the best way to help entrepreneurs is to structure transactions in a way likely to generate positive financial returns for both lender and borrower.