Today I learned Twitter is serious about using aggressive following methods, even if they are done manually. Though they will not give you exact numbers or boundaries to stay within (understandable - as then software could automate it all), the flip side of the coin, is you have no way of knowing when you cross the demarcation line that will get your account suspended.
What is the cutoff number? 50? 200? 1000? I read a post where the person claimed, "I use this software to follow a 1,000 limit a day and to unfollow anyone who doesn't follow me." I proved today that you cannot follow 1,000 people in a single day.. My follow amounts were split over two days and may have been 700+ new follows at best. Attempting to maintain a tight ratio by unfollowing those who didn't return the favor, also hurt.
I was anxious to break the 1,000 follow mark apparently, as I was sitting at 979. I'll chalk it up to a lesson learned. My fingers are crossed to get the account reactivated.