I can tell you this:
You might be able to make a few bucks. That's good. You do however need to register with bookmakers, which means that you need to share your personal info.
You need to know as well that this can be done only a few times. You can't make free money forever.
So this method does work, but only a few times. I wouln't spend $50 on this, because you can easily invent this method by yourself.
It is a legal method by the way.
and so wat if u have to use personal deatils??
When you have to fill in your personal details, you are not really anonymous.