What can cause a mass unfollow from twitter?

[capricorn]

What would cause a mass exodus of people to unfollow you from twitter. Just started using and was following people and they were following me back. Posted every other day or so and re-tweeted people. Did not automatically follow, only people with same interests. (Had several interests) Would it have to do with me tweeting things from "share this"? Because I did not stick to one interests? Because I did not re-tweet everyone. I lost 40% of my followers all in one day. What am I doing wrong?

[Johnka]

Not really physics is it? Maybe they did not like what your were saying!