Because people are looking for popularity on twitter, so they may forget about twitter rules and therefore potential for account ban. Following is why user getting ban on twitter.

1. You’ve followed a large number of people in a short amount of time (probably using third party  software to bulk follow)
2. There is a small number of followers compared to number of people you’re following (you are keep following but nobody follow you back)
3. The updates consist mainly of links and not personal updates (probably you are paid to post a link)
4. A large number of users blocking the profile and writing in with spam complaints (you updates are suck, no information, nudes, racist, extreme religion)