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?
Hell no. It's easy to say that bitcoin was being generated at their site. It's just a script and an average coder can do that just to show their "victim" that everything was going fine and it was truly generating bitcoin. Just imagine how come they will pay all the people that will use their generator.
Don't send any amount to the bitcoin address they will show you just to get those generated bitcoin they showed you. There is no such thing like that and hopefully these kind of thing will be an obvious scam to your mind so that you are aware next time.