I think these disclaimers are pretty common from game studios. There's always the chance a person will post an idea on a forum, then a similar feature will be implemented in the game. The poster will believe they are the originator of the idea and sue the developer, either in good faith or misguided gold digging. The lawsuit might not succeed, but still cost a lot of money for the developer.
ie. Someone suggests Rimworld have hoverboards, dev responds publicly and the game later adds hoverboards. Poster sues, and possibly even wins because of legal technicalities.
-edit for clarity and tone
ie. Someone suggests Rimworld have hoverboards, dev responds publicly and the game later adds hoverboards. Poster sues, and possibly even wins because of legal technicalities.
-edit for clarity and tone