The only way I would pay for signals is if the vendor explained how they were generated. Then I would be able to generate them for myself and stop paying him.
Yes! there are people who are ready to pay for signals. And I do not see any harm in paying for the signals if they are coming from a reputed signal service provider. You have to research and find about such service providers.
We document our trading via C2 https://automatedtrading.optimusfutures.com/system119383938 in C2 you cant change signals, edit or delete. You get signals in real time and choose whether to trade them or not. The key to receiving signals is to make sure they are documented in real time.
Funny story short: My fathers best friend follows a signal to trade in the opposite direction and is up more than 15% this year