Many people earn much money from internet, but how I can make money?

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Many people earn much money from internet, like open the shop in the ebay, taobao etc, do export business online, like alibaba, and like other people do online internet, like do get paid to post, PTC etc, like do the affiliate program, like to build up a website or blog etc, so many ways to earn money, but I found it's very difficult for me to earn much money, so how I can make money from internet? I always think whether it has a good way to earn money from internet without investment. Mylotters, do you have a good idea to earn money from internet? Pls share your experience here.