Strong points of entrecard?

One of the strong points of entrecard is that we can have many traffics ( i dont know if it is quality traffic) and you will have good alexa rank. I already try it and my alexa from 1000000 now become 200000 (in other blogs not this blog). It is worth for new blog or for beginner. But if you want to earn money by those traffic, i think you can not because people visit your blog for earn entrecard credit not information. But, maybe i am wrong and you will find a good way to earn money. If you have a way to earn money from entrecard, please tell me. I am very interested in your experiences.