how many accounts can you run on tweetadder

I am thinking about buying tweetadder, how many accounts can run on it at once. Also, how many followers can I add a day on each account?

According to TweetAdder's web site a license costs:

$188 for unlimited twitter accounts
OR
$110 for 5 twitter accounts
OR
$55 for 1 twitter account

AFAIK you can follow an unlimited number of twitter accounts. However your twitter accounts will quickly become frozen if you shotgun the world. Which is why you should build your followers gradually, unfollowing accounts that don't follow you back.