Like the others, it would be nice to earn some income from writing on Hub Pages, but I do it because I like writing and sharing and exchanging information with others.
I also consider it as preparation for publishing a book in the future.
Let me also say, it is a place that is rich in learning and knowledge. There is so much that I have learnt here...about everything, but most of all about writing online and knowing the tools and language of the worldwide web.
This place is an educational institution.