With SpreadYourTweets, its either you are a Premium Member or Regular Tweeter.
1. Regular Tweeter: This is always free. You will get 60 new followers per ride. Promotional status updates.
2. Premium Member: Now only £4.95. New followers every minute. Ad free and instant activation.
SpreadYourTweets does not send messages or alter account details. Since I have not tried out the premium account to increase my Twitter followers, I would advice that you stick to the regular tweeter which is free and you can use it up to three times daily. Note: SpreadYourTweets is not affiliated with Twitter.