Thank you. What clinched it for me was when they sent me the big envelope with their pitch, "Become rich with no work." Wait a minute -- what happened to "this opportunity is only for those willing to work at it"?
The "become rich with no work" bit was classic MLM -- supposedly, after paying over a thousand dollars for materials, I recruit new distributors, and get profit from their sales. One problem: let's suppose I recruited two or three, and they all had as much success as I have (i.e., zero). Well, then my share of their profits is also zero. Basic math. I will not touch MLM. By now I am long past the window for returning the materials, so I have swallowed the startup costs I paid; I am thankful that I had enough sense not to go for the more expensive parts of the scheme.
If anyone reading this is thinking about affiliate marketing, my advice to you is: always start small. Do not spend more money on supposed "upgrades" until you have seen returns from your initial costs. Every smart entrepreneur knows the only way to grow a business is gradually, using the profits from the venture itself.