For all practical purposes, the de facto "Master List" is the list of possible DQ vendors you can opt into or out of under each member's personal Settings Control Panel (upper right-hand corner of each screen), under the General Settings screen (selected from the left-hand sidebar menu). From this Control Panel each member can select which, if any, DQ vendors whom they wish to subscribe to. By default none are selected as enabling each authorizes us to share your personal information with each vendor, so for privacy reasons they all default to "off" unless the member explicitly elects otherwise.
Subscribing, however, only makes you eligible for DQ *if* you have met all of the other program requirements as outlined under the "Policy" tab on the main menu bar.