I want know if these BTC generators websites are really working? I have tried using one and made few BTCs, and when I was about to receive them, I was told that I should pay a certain amount of BTCs before the BTCs I generated can be sent in my account. So I don't want to send and never receive, and I want to be sure if they are working or not. Has anyone used that?
No! OP please don't use fake bitcoin generators if you care about your money.
All bitcoin generators are scam, bitcoin isn't something magical which will just pop up out of nowhere. You have to use electricity and hardware to mine it, no one will and can generate it for you for free. Nothing is free. Remember that.