I'm far from an expert on Twitter, but I have been playing with it and watching it for a few months. If you want to increase the number of followers, which is important for some people, there seem to be a few ways to do so.
Unlike blogging, it doesn't always seem to be about quality of content, but more about frequency -- just being out there. That seems to lead to a lot of inane chatter about what you just had for breakfast or what song or TV show you happen to have on while you're tweeting.
While I've complained about that inane chatter, I do understand that Twitter can and should be different things for different people. For some, it's like having a bunch of friends a few keyboard (or phone touchpad) strokes away, to chat about a film or news event. For others, it's about sharing information and pointing others to articles that they think might be of interest. And for others, it's about discussing professional issues in whatever business they're in.
All well and good. I'm learning to filter out the chatter from my "follow" list, so I can focus on getting what I really want from Twitter.
As I'm sure happens with many others who use Twitter, I get messages telling me so & so is now following me. I take a look to see who that person is and what they tweet about, so I can decide if I want to follow them. When I see someone is following hundreds or thousands of people and they have relatively few updates, I've learned that's often someone looking to sell something.
The latest thing I've been seeing is sites that promise to instantly gain you thousands of followers. Spend $85 and you'll quickly get 1,000 new followers, a recent one from across the Pacific promised me.
Why would I want to pay for followers? I'm not trying to impress anyone with numbers. But I suppose some people are. Paying for followers, though, is like gaming the system. Or like a politician buying votes. Not fair, not right.