It's not technically a pyramid scheme.
The pyramid version would look like this [DISCLAIMER -- This is FRAUD & ILLEGAL!]:
********************
Get a new Mac for only $100! Sound too good to be true? It's not!
Take advantage of our bulk purchasing capability!
We pass savings down to you!
Your money back if not completely satisfied!
Just send us $100 and you'll get your brand new factory sealed PowerMac!
Allow 8 to 12 weeks for delivery.
*********************
And then it would run like this:
1. Run the ad.
2. When the first 30 people send in their $100, buy a Mac and send it to the first person who answered. Do this as quickly as possible.
3. Hopefully, word spreads that the "offer" is "good" and more people send in money.
4. Make good on the first few responses -- those people are the tools who will sucker their friends into sending money.
5. When the money starts to roll in, cash all the checks and skip town -- because there is NO WAY that you can actually fulfill all the orders.
6. Try not to get tracked down by law enforcement.
7. Get tracked down by law enforcement.
8. Arrest.
9. Arraignment.
10. Indictment.
11. Trial/Plea Bargain.
12. Jail.
13. Don't drop the soap.
On the other hand:
macgeek2005's plan is really just charity. Some MR members give, others get. Interestingly, the logical extension of the plan (everyone gives $1, someone gets a Mac; everyone gives $10, 10 people get Macs) is that everyone gives $3000 and everyone gets a Mac. Which is not illegal, just inefficient.
My REAL question is this: how do we decide on who gets the Mac?
We would all have to send in our $1 and then have a nomination process and then a voting process. It could work. I know that I would give a dollar (and I
highly doubt that I'd get picked to get the prize. And I'm OK with that.

).