Nothing would make me join a (short term) signal provider. Newsletters or analysis/research on medium/long term macro-outlooks or similar would be of interest, though. But just to back/supplement my own views. At the end of the day you are on your own in this game.
If you haven't found out yet, the trading world is full of charlatans whose sole means of making money is by "teaching" others how to make money or selling one "profitable" system or another. They must have figured out that it's far easier to make money this way than to actually trade. In simple terms, signals don't work.
I'm actually proud of the fact that I never paid for any expensive trading courses, signal services, chat rooms and so on. Spent a lot of money and time on books, though, which also were mostly a waste. It's my assumption that 80- 90 % in the 'teaching business' are crooks. The best you can hope for is some ideas/inspiration for further research. The funny thing is that once you start researching you'll often find that the truth is different than portrayed in much of what is 'taught'.
Yes, this is good too. Tenkofx offers this. They are some good traders with more than 12 months positive records. I have not been able to bring myself to invest in copy trading.
I have never joined the services of signal providers. This will not teach you anything, you will just mindlessly copy other people's trades in the hope that they will be true and at the same time not know what strategy this trader-signal provider trades according to. A trader must develop and be able to independently assess the situation on the market in order to earn stably and not depend on anyone in his earnings. Isn't this the goal of a real trader?