I don't see this business or other similar ones as con men - it was obvious when the news came out last July that the Government were drawing up plans to stockpile processed food that someone would see an opportunity.
As the lady in the article says, she has a history of stockpiling for hard times based on her past experiences, others who have bought into this will have their own way of thinking.
Companies prey on our insecurities every day - as always Caveat emptor.