Wait? Who's giving Bitcoins to whom in this idea? I'm lost there.
A person receives a Ponzicoin (Bitcoin) install program from a friend.
He installs the program, buys a bitcoin into his bitcoin wallet, and sends .5 bitcoins to his upline by checking the checkbox and clicking the Send button.
He takes his newly created Ponzicoin install program that has his Bitcoin address in it, and gives copies of it to everyone he can think of.
Some of the people who receive the install, use it to join Bitcoin, themselves buy a bitcoin into their wallets, and check the checkbox and click the send buttons, and get their new installs created for them to give/send out.
The person (the first person mentioned in this post) who gave them the program receives .1 bitcoins from each of them, as do the 4 people next in line upline from him.
If 10 of the people he gave the install to use it, he gets 1 bitcoin (.1 from each of them). When they give their newly created installs to other people, he gets more bitcoins from any of those people who "join."
A reasonable explanation of this whole process can be found at
https://en.wikipedia.org/wiki/Multi-level_marketing . Look for the picture with the circles about a fifth of the way down the page.
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)