 In May 2016, the plan called for The DAO to invest Ether in ventures it would back (contractors) and to receive in return "clear payment terms" from contractors.The organizers of the DAO promoted the DAO as providing investors in the DAO a return on their investment via those "clear payment terms" and they warned investors there is "significant risk" that the ventures funded by the DAO may fail.Risks included unknown attack vectors and programming errors.