I was actively involved with a network marketing company several years ago, and am still a member and customer, but not involved in the business part of it any longer. At the time, though, it was fun and there was some success. I made a bit of money and won 4 trips, a couple for myself, one that I went on with my husband, and one that we went on as a family of 4.
Whether or not you are successful at this type of business depends upon how much support you receive, how persistent you are, and many other factors. If you are interested in learning more, you will find some support at Mark Hall's MLM Opinion, a site that offers advise and support for those who are interesting in this type of business. Some network marketing companies are also called multi-level marketing businesses, this is what the letters M L M stand for.
Though some tried to discourage me from getting involved with the company I did, in my case, it was successful for a time, and part of some very happy memories.