I have tried many of these channels that claim to provide successful trading signals, but I've only benefited from them a little. Even the paid ones are worth nothing. Most of them brag about their successful trades and the confirmed signals they provide but most of them are liars.
I too had joined many such channels in the past, after seeing their free channel promotions and joining their paid signal group. But I didn't get any good results even after using their paid service.
Because they used to give 10-20 signals every day and the maximum of those signals were negative, and if 2-3 of them were successful, they would take credit for the fact that they had given the signal for this sure trade, but they would not say anything about the rest of the losing trades. These are actually a big trick to attract traders, and many newbie traders fall into this kind of trap, which takes them a long time to understand and ends up losing money.