I wasn't going to post this, because I assume that most DDers are savvy enough to avoid (especially after the whole ambit debacle), but I'm seeing some pretty savvy people joining.
I was contacted over a month ago to listen to a "speech" of someone explaining how to save money on travel. I was suspicious, and refused to go, unless he told me more information. I got the usual "just come, just come". After refusing, he gave me the name of the company, and I did some research (ie. google). Turns out you have to pay $200 to join and then $25 per month. You make money by signing new recruits.
They obviously offer services to make it legal (discounted travel), but it still is a pyramid scheme. I just want to point out, that yes you can make a lot of money working a pyramid scheme, especially if you get in on the top. Some of the people that signed up for Ambit when I was solicited for it made good money. What you have to ask yourself is, do you want to have the suckers at the bottom on your conscience