Faith on god - A smart way of generating money

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I do not know how many of you have come across this : There are some emails and letters or text messages on cell phones floating around the world. The content of the message basically would say " So and so received so much of money or your wish would come true etc. if you pass this on to 10 people and if you do not pass it and keep it yourself it is a bad omen" . Now the person who receives this message will tend to forward it to 10 more people if not for good luck the bad luck is something which scares every one. OK, how does it generate money ? When you send 10 text messages, lets say one message costs 50 cents 10X50 $5 is earned by the cellular company. Further the 10 messages you sent will multiply by 10X10=100 which is $50. Next the 100 becomes 100X10=100 and so on. Lets say a total of 1000 people forwarded these messages in a day which is 1000X10=10000 and that is $5000. Now email is a little tricky. Though one may feel that no one is making money, the service providers like yahoo,g mail,msn etc make their money out of it. Each service provider keeps an account of how many mails are being sent using their service. This helps them to project their service in the market as high visit rating which would decide their ad costs. More number of emails would increase their ratings. I still have not figured out how the normal mail contributes to this. Can any one tell me how does letters earn money ??