• Uber drivers, as well as drivers for Lyft and other ride-hailing companies, are turning to alternative means to make some extra cash while they drive.

• Experts say the rise of these supplemental sources of revenue are an indicator that ride-share drivers feel underpaid.

• A recent MIT study claimed that Uber and Lyft drivers make less than minimum wage.

• When it comes to pay, both Uber and Lyft drivers have criticized the ride-hailing giants.