Just curious: which section of the Twitter API ToS do you read as restricting notifying them of people that unfollowed them? I know that the API policy explicitly prohibits automated unfollowing and restricts automated following, but haven't ever seen anything that addresses notifications of a someone unfollowing another user.
> Respect the features and functionality embedded with or included in Twitter Content or the Twitter API. Do not attempt to interfere with, intercept, disrupt, filter, or disable any features of the Twitter API or Twitter service, and you should only surface actions that are organically displayed on Twitter.
It's a big bummer as a potential Twitter-hacker, too. I can see why they wouldn't want clients & add-ons to surface unfollows, but it blankets quite a bit of functionality, and then it comes down to an issue of selective enforcement. Sigh.
The way I read it is "don't do things we don't already do" which is a really bad constraint, effectively forbidding any kind of innovation. I can understand the spirit of their selective desire to address this specific violation, but I'm not convinced it's as much of a problem as they're making it to be.
Oh well.