If they are getting money to gamble more than they are earning them maybe they didn’t tell you the exact amount they are earring or maybe the bet is paying them off and they are not telling you about it. In any case if they were to be my friend Would ask them to be sincere with me and tell me where the money they are using to game is coming from, and if it from them same gambling I would ask them for games too, who doesn’t want to make money? Nobody.

Another point is they might already be addicts and addicts will always look for means to gamble even if they would borrow they won’t mind, some might even end up selling their valuables just to gamble. I don’t have friends like that but I have see people like that and honestly it a very bad position to be in. If so then advise them which I know they won’t listen to because they are already addicts. But at the end you’ve played your part as a friend by advising them.