If you're earning with their free signals then it's good, but the question would be "for how long?". Maybe they are just making you thirsty about making profits and then they will stop giving you free signals, guess what's next, of course they are going to ask you a membership fee for you to continue having their "free" signals.
Why it's matter? he can just pay the membership fee because he already have enough profit when the group/channel was giving free signals. The thing isn't how long they're offering the free signal, but how accurate are their signal especially on bear market. Trading in bear market is really hard because you would lose a lot money since the chance of losing is higher compared to bull market.