Please can somebody tell me the best straight line matrix to invest in

Aren't straight line matrix's a very bad idea to begin with? Tell me how that works, and I will explain to you why I think it is not a good idea. Why not try getting to something a little more concrete. I could give you some decent information on network marketing, that could earn you a fair amount of money if you work at it, and cost not so much money, and you get great products to boot. But, then people are buying stuff, so more money is coming in always, but straight line matrix, where does all the extra money come from, how many people have to lose out so that how few can get rich, kind of like stealing if you ask me.