Johan, lead designer at Paradox who stated that he personally seems to support this idea, talks about how
this may become a nightmare for game developers:
I personally dont see how paid mods could work for our PDS games that are constantly updated.
Keeping large mods up to date after a major patch is ALOT of work, and if people have paid for them, they have much higher demands.
It would also force us to take modsupport into far bigger account, potentially making worse experiences for the users, as we may be forced to not do what we feel is the best design because it breaks some mod.
I mean, I've met @gigau and @myzael they are great people and their mod is really good. However, I don't even consider the impact for them to update M&T when we change or add features in EU4, because my job is to make the best game possible, not a technology-platform.