My friends wife approached me today wanted to know if my wife and I would sit through a 90min demo of this air purifier/vacuum machine from Rainbow(?). Doing this would get me a counter top purifier and if she could get 19 others to do this, they would get the full size machine free... I'm no financial guru but it doesn't add up... How can a person do 20 demos, giving away a purifier (reportedly a ~100 dollar value) each time AND give her a combo machine? That's 30 hours of work, possibly $2000 worth of equipment us whatever this bigger machine costs all for nothing!? What gives? Who's paying for it, or where is the money coming from? There's no such thing as a free lunch, right? Interestingly, the demo rep is a person both my friend and I know - he's actually kinda buds with my friend. Also, my friend is usually pretty shrewd with money, so I'm sure he won't get bit And to answer the inevitable question - no, we're not going to do the demo and are not interested whatever is being sold.