Are you dumb, have you read giants TOS?
All user generated contents on ModHub are properties of their respective creators. GIANTS Software and our co-publisher/distributor are not responsible for these user generated contents or any damage they may cause to your game. If you think your user generated content or parts of it are on ModHub without your consent, please contact us.
At the bottom of the Official ModHub website. Now Go touch Grass
You obviously have no understanding of what open source means. If the game was open source, the entirety of its code would be available for users to make changes to. Open Office is one example of this. Most of the code in FS25 is locked and can not be modified or even viewed easily by users. While you can view all of the code for a mod, these fall under copyright. I am assuming you are under the age of 21 based on your comments.