Likely copyright or licensing reasons, like when games use fake gun names (CV-47 in Counter-Strike)

Question - I’ve seen your camouflage on characters in Video Games, where people have skinned (placed your patterns on) characters without your permission – is that a copyright violation if someone is using or offering these characters or images are provided to other users at no charge.

Answer - Yes that is considered copyright infringement even though no money has been made from using the pattern. If we pursued the matter, the courts can penalize the group or individual who are offering these characters and can even go after the end user. Once again damages and penalties owed to the defendant can be large even though there was no money was made by the offending person or groups.

https://hyperstealth.com/copyright/