At one point they would give the actual spread and talk about whether a team would cover. Then they just started giving predicted final scores of the game, while stating the spread, but give winks and nods about it. Then they just started predicting who would win, partly from pressure from moralizers, partly because the NFL is conflicted about gambling, which drives interest but risks credibility. More recently they have become less squeamish. Fantasy football was once seen as a way to drive similar interest without gambling, but then that became gambling too, and now we have a franchise in Vegas, which at one time would have been unthinkable.
I suppose their were people who were scandalized by Snyder, but I would not say his predictions were a scandal per se. He became a scandal, and was fired, for saying that slavery resulted in the biological superiority of Black athletes, and that “the Blacks have everything, coaching is all that’s left for the White man” (quote approximate).