Whats the highest income for a PTC site?

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Hey whats up peoples I was just wondering whats the maximum amount of money that anyone has ever made in a month from one single ptc site. Is it possible to make a decent amount of money of just a small few sites maybe even 1 or 2? I know people make money off google adsense with lots of traffic for clicks but I want to know if you can make hundreds of dollars or thousands of dollars a month from one single ptc site has anyone here done it? In which site is that possible?