Keep track of who is following you and who left. (Since Twitter either
doesn't want to, or can't.)
Followers are hidden after 14 days of not following you.
Enter Twitter username / password:
Privacy policy: username/password is not stored.
Followers are stored for tracking purposes. (duh)
I have neither the time, nor the inclination to figure out how to use OAuth.
(or if it's even possible for this)