Social Media HARD Limits (Twitter)

Following limit for new accounts - 5000
Following limit for 'old' accounts - Followers x 1.10
Tweets per day - 2400
Tweets per hour - 100
DM per day - 250
Email change per hour - 4
Lists limit - 1000
Max header resolution - 1500x1500
Tweet word limit - 140 (280 in experiment as of writing)
Bio word limit - 160
Max people in a list - 5000
Following limit in 1 day - 1000 (old and new accounts alike)
Unfollowing limit - unspecified. Scripted unfollowing may be detected.