what does the star and number inside signify

The star and the number are a rating given by other users to you. Right now you have 2 stars out of 10. If your score is very low maybe people don't like what you post or you are not making interesting or good posts. I guess it has nothing to do with money, you don't receive more because you have a highest score. The score just gives you the idea of what other users think of your posts.