This is a complex ethical question, at least for me. An acquaintance introduced me to an internet marketing business which offered ad-sharing that returned $5 for every share purchased once the share retired. When I bought a lot of packs and received 2% per day ($10,000 investment) it adds up and I reinvested every day which made my shares grow. I checked it out and it is not a Ponzi scheme. Since I do not have a business to promote, the traffic that I am buying with my shares are sent randomly to all the other businesses who are promoting their sites on this traffic exchange – Traffic Monsoon by name. I have to view 10 ads personally every day to be a part of the revenue share.