Well, for those playing on console, can today only run mods/DLCs made by Bethesda. They who play on PC can use mods now actually. They use the old game editor. Some third part program allowe players to include mods in FO 4 even Bethesda have disabled that option for now. If PC users needs to pay for the mods as well, they need to charge for installing and using the game editor. I don't see any reasons for that, because everyone can use the old editor whitch is free. Maybe in a distance future.... then we will be so old that only card game Bridge is only options to having fun playing games and they who are too young to play any games today, do not know about this thread or even this forum.
Cheers,
-Klevs