Pay-to-click websites, why even bother?

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Recently I have been hearing a lot about these "PTC" websites. After reading about them for a little while, I decided to give them a chance and try some out. So far, I have been testing the following websites. http://donkeymails.com/pages/index.php?refid=taylorpelto looks professional and nice, emails are usualy a quarter of a cent each. http://www.10-ads.com/pages/index.php?refid=taylorpelto is a pretty small site. I don't get as many emails but they are worth more (half a cent) http://rns-topfuel.com/pages/index.php?refid=taylorpelto is the one I like the best so far out of all my test sites. It gives lots of emails which adds up nicely. http://hits4pay.com/members/index.cgi?taylorpelto makes you wait to be approved, which I have no problem with. They also give a 10-dollar bonus, which is awesome. http://kindred-spirits-advertising-firm.com/pages/index.php?refid=taylorpelto is a smaller site, but has something like one cent emails. I like it, it seems very honest. http://www.exodus3000.com/?r=taylorpelto is just cool. You play a game, and you can exchange points for real money. It is fun. so, with all these sites and after three days of clicking away, I have only made about ten cents. Is this normal? If so, why are so many people obsessed over these sites? Has anyone here made anything substantial? If so, how?