No it's not a gold mine if you are only here for cash. Remember most new users are from Facebook we content only rewards Facebook. The latest round of new users are here primarily for greed not sharing of knowledge with others.

Our rate of earnings is dependent on how many click on the up vote button. More importantly upvotes on comments of value. Your comments actually gain you more than creation in the long one.

I comment on good posts. I upvote good post. I also upvote all comments on my post. Provided of course it contributes to the post.