I've read more than a few hubs with this comment written somewhere into the text:
"Vote me up and I'll write more."
On the surface, it seems like a simple act of reciprocity. You obviously don't want to do all that work without knowing if it is worth it or not. But really, to me, it just seems like a lack of confidence on the writer's part.
Like, if you're that good at what you do to begin with, it should show up in the writing. You'll attract readers with your good writing, not with "Vote me up or I'll jump, I swear it."
Comments, thougths, disagreements, recommendations for therapy? Anyone?
"You talkin' to me?" by Travis Bickle (Robert De Niro, Taxi Driver).
Most hubbers know to vote up or vote down your hubs, but some forget.. so it is just a reminder to do so, if they liked what they read. Plus you are giving your fellow hubber some help in improving their Hubscore. A vote up is like a pat in the back, saying "Well done, dude!"
Most of our visitors are not hubbers, so it is a good idea to remind them that if your article was helpful to them, to let you know by voting up your article or leaving you a comment.