A lot of people don't care one iota for the accoldaes on activity. The only ones they care about involve number of views, number of followers, and number of hubs published. They would rather not have to hub hop at all, but it is asked of us to flag the garbage and the violators of the TOS.
I have been known to leave small comments on hubs that don't interest me that I read in the hub hopping because the person is new and welcome to hubpages.
I follow certain topics that interest me personally. Those I read fully in detail no matter if it is 1:30am and leave a specific comment. For me, I love cats and everything to do with writing, especially mystery and suspense. I come from a family of professional musicians, professional visial artists, and writers. Dad was an actor for a while, but got further in music. As a result, I love evey topic that fits any of these categories. I've written several hubs on all of these topics and I always interested in reading hubs on them. It's unfortunate but inevitable that I followed my parents into the world of professional art. sigh.