I would like to share my experienced adding follower on twitter.. put follow me text or image in your global website is not optimize... I know where the best place to insert it.. Go to your wordpress stats and look for posts that have high traffics and visitor loved it.. now insert your text or image link your twitter.. like this post Resetting Epson T11 everyday I get 30 - 50 clicks to my twitter, 90% of its to be my follower..
Just get out there and do it. That is all there is to it. Put in the time and effort. The more proactive you are tweeting the more likely you are to get a huge following.
If you want to make money using your twitter account you have got to see this video http://bit.ly/8MGd8Y HTML:
I don't see a twitter button??? oh, I see the link now... I also see all your post are automated and done with an API, this will get you dropped from my followers in a heartbeat good luck with your method, although I think you could do much better if you actually interacted with your followers.