No, it doesn't work like Twitter, although a lot of new hubbers treat it as such. Following people here means you like their writing primarily and want to see more of their work. Or you want to follow someone you consider an example of a writer you want to learn from and emulate (not copy, but pick up techniques). Although there are social aspects of HubPages when interacting with the community, the emphasis is more on the craft of online writing, learning from more experienced hubbers, and less about gaining followers. Followers will come (or should come) naturally. Good luck and be blessed.