I heard many of my friends get suspended but not banned for doing the bounty ads , maybe you should not do a massive retweet and tweets for a day , twitter can judge you as a spam content that will lead you to suspended.
When you get suspended , just try to contact the help in twitter , just hope they can release your account again in 2-3 days , when it pass 2-3 days , thats mean your account had been punished and you cant save it.