There are basically 3 ways in

1) Birthright i.e. your father, uncle cousin etc.

2) You are a big earner essentially you are buying your button that way. Keep kicking up
.... It's all always about money.

3) You are involved in a murder plot for the family.

In 2018 really aren't any murders anymore.

So either your taking over your dad's or uncles rackets or your earning/paying enough so your captain or boss will sponsor you.

Out right buying the button has probably happened a LOT more than we know however, it is against the rules and no one is looking to open their mouth about it.

It would go something like this you are seeing whoever is over you with an envelope(s) and you express your desire for the button, he gives you a wink as says keep this up and when they open the books I'll put you in.

Now whether that money in that envelope is coming from actual rackets or it's the guys communion money nobody knows or cares.

In life especially in cosa nostra what matters most is not what you are doing rather how you are doing it..