I've only got a couple and I've had the hardest time with some of the newer accounts. They get suspended really quick. I'm using tweet adder 3 but I'm only following 100-200 people a day and I never unfollow on the same day as I hear following and unfollowing will get you slapped real quick. I was using a wordpress plugin to do auto tweets of my pages on the site which included a link of course. Could this plugin being setting off the alarms?