To be honest, I also joined groups that talked about or even gave predictions for football and boxing betting. but the predictions sometimes don't match my thoughts. I follow the group just to see the predictions given. I don't really use the predictions given for my bets. although in some games it might seem reasonable.
What we need to know is that those who providae betting predictions are also based on simple analysis. we can do it. It's just that I will choose to bet only on matches that I really understand the teams competing.
I'm not sure predictions really help. but sometimes it gives us a reference for making bets.
Those type of groups have absolutely no idea what's going on, so they just do whatever they can do to make people believe them, but in reality how could you have any idea how a game could go, even the players who play the game do not know how it will end, so it's just made up prediction.
The only thing that they have going for them would be their odds, because if they do track how much they would have made you then you could see what losses and wins they have and if you wagered like lets say hundred bucks on them then how would you be, then you would know the result. But other than that, it's just prediction and they are a scammer if they claim they can make you money, it will not be all that simple and we should avoid that if possible.