Rockstar (Rockstar Games Present Table Tennis) is reportedly in talkes with Fortnite and Roblex creators for user generated content in 'GTA VI'.
https://www.videogameschronicle.com/news/gta-6-rockstar-is-reportedly-planning-roblox-fortnite-style-user-generated-content/
https://www.videogameschronicle.com/news/gta-6-rockstar-is-reportedly-planning-roblox-fortnite-style-user-generated-content/
Comments
Safe to assume take2 wants to monetize this part. Only reason they allowed that mod to exist (and make money) is because it drove gta5 sales.