Using twitter as a marketing tool is one of the best steps that you will take when you are trying to send traffic to a sales offer or a squeeze page. There are some simple tips that you can take notes of and use to increase your twitter following and avoid bans.
Firstly you must never use more than one twitter marketing tool or software on one twitter account. This will put you at risk of over stepping the twitter limits and get your account banned within a very short space of time.
Secondly multiple accounts are always going to be more powerful than single accounts. If you run multiple accounts and use diferent tools on each, firstly you will see which tools work best for you and secondly you will only lose one account if you get banned rather than losing everything if you only actually had one account.
Thirdly there are lots of traffic swap tools on the internet that you can use to swap follows for follows or tweets for follows in he form of points that you earn for following and retweeting. Search google for these tools and use them. One per account.
Finally, Always track your tweets, use bit.ly or another link tracking servive to track the clicks on your links. This way you will over time be able to see what type of text in a tweet converts to a click throuh and indeed if you are using multiple accounts you will be able to see what profile pictures and user names are best.