Would it be OK to use some real life elements in the game? for example you need to go to websites, automated calling systems and social media to find hidden pass codes? Almost like a real life but still digital Easter hunt but the main gameplay would will be the GameBook.
I think it is fine, so long as those websites or other elements don’t have content that goes against the rules (is bigoted, hurtful, hateful, or unkind) or could expose players to any kind of danger.
It’s definitely an interesting idea worth exploring, where gamebooks meet ARGs perhaps?
To be clear: any kind of gameplay (or things that aren’t gameplay) is welcome, you don’t need to follow any gamebook conventions at all, just be considerate of your players/readers/audience :)