If LGP remove DRM from Shadowgrounds and Survivor, LGP buyers lose these options:
"Allow people to see your license is valid - for if you sell your game.
Check to see if you are buying a game with a valid license.
Transfer your license to someone else.
Download a replacement disc image for your licensed game.
If you lost your key, retrieve it here.
If you forgot your password, retrieve it here."
http://keyserver.linuxgamepublishing.com/?
They still rental Shadowgrounds and Survivor and they are able to verify an owner.