Dont forget that there are almost no projects or pages on the internet that do or give something for free. Those who run prediction site are no exception. Their goal is to either sell banners, or make users register with their referral links. Such sites earn from users deposits. When users make deposits? Exactly, when they lose. So no wonder that goal of predictions on predictions sites is never to help to win.
What you say is very true, something that is available on the internet is of course paid if we want information about predictions then we have to pay for it even though the predictions given are not a guarantee of winning the bet and it would be better for us to analyze the bet we are going to play ourselves and If what we do is we can win our bet, of course this is very enjoyable and if we lose, we make our own mistakes in analyzing, but if we use a betting prediction service and we can't win the bet, of course this will be very sad because we lost because of other people's predictions.