The only way you can get a lots of Twitter followers is by bringing lots of users with similar interests as yours to view your profile. Many of the visitors will start following you. I have created a WordPress plugin which brings real and active users to your profile.
This plugin favorites Tweets of other Twitter users who share the same interests as yours or likely to be your business customers. This make them notice and visit your profile. For me 7% of visitors converted to followers. Its a great and automatic way to get Twitter followers and ultimately gets an lots of social traffic.
Large Twitter followers helps me to get sponsored tweets and ultimately I make money by doing nothing.
As I benefited from this plugin so now I have planned to let others use it.
Once you have started using this plugin and got a good number of followers you can use Fake follower APP to check the percentage of real/fake followers. I guarantee that 99% of followers will be active and real.