Since that website is for scheduling tweets, I have to assume that the post is serious, but if I followed anybody who tweets every 30 to 60 minutes I would imme

Since that website is for scheduling tweets, I have to assume that the post is serious, but if I followed anybody who tweets every 30 to 60 minutes I would immediately unfollow him for polluting my timeline. Now, if the tweets do not show up in my timeline it's different of course. A company can tweet every single minute on Twitter if they reply to people and start conversations since this does not show up in everybody's timeline. See Hipmunk for a company that gets this right, for example.