The data of people they hold would also have significant value (one of the prime reasons why UID project is being undertaken) which probably is difficult to put a figure - any marketer would be ready to pay for this data. How they grow on no. of people/no. of branches and drive the AUM would be probably driving the future? Diversifying and getting into new businesses for this segment would not be very difficult given the network and reach which the MFI players can reach.

 

Grameen Bank for example got into housing loans, fisheries, phones, educating, training etc. etc. for the poor.

 

Banker to the Poor by Mohammed Yunus, founder of Grameen Bank is an excellent read.