Is Trippier employed by this betting company? Or do they sponsor the FA so he has some obligation? If not why the hell should he care? If he wants to talk to his friends it’s of no concern of the betting company.
All things you can bet money on these days 
It’s hard to predict you will score 3 goals in the next game, but silly bets like transfers or what hair colour a player will have are legit? Idiots.