I'm extremely skeptical about those things, honestly. They prey on people looking for an edge, but I highly doubt they actually work. Beread.in shared an article about "predictor" apps that really opened my eyes. It's called From Signal Groups to Predictor Apps: How JetX Prediction Gets Packaged for Players and it gets into how these things are marketed and why they seem believable.
https://beread.in/game/from-signal-g...ed-for-players They're selling the *feeling* of control, not actual guaranteed wins. These signal groups hope to create a system that seems like it's working. If something sounds "too good to be true" then it probably is.