I've never felt Hubpages would be a major revenue stream for me and, thus far, it hasn't been. But writing Hubs has had a major effect on my writing overall.
For most of my life, I've crafted stories, shared them with my family, and actually put a number on paper but never published. Since becoming a technical writer/editor over 30 years ago (which pays the bills but isn't always exciting), I found myself less likely to write for pleasure. Until I discovered Hubpages, which has re-activated the creative writer in me. My Hubs tend to be informational and not reflective of my other writing. Since I've begun writing Hubs, I've regained my interest in creative writing and currently have 2 children's stories being illustrated, a science fiction novel being edited, and a science fiction anthology in development. I hope to e-publish these in the next few month through Amazon/Kindle and possibly Barnes and Noble/Nook markets.
After working on the two children's books and the sci-fi novel, I felt wrung out. After writing just one new Hub, I feel re-invigorated and the idea of the anthology popped up. I have a few more informational Hubs I want to write soon, then back to more creative works.
Sorry for the long answer. Guess you brought out the creative writer in me. Cheers!