I just got an interesting form email from the CEO of IFTTT, which read, in part, as follows.
In recent weeks, Twitter announced policy changes* that will affect how applications and users like yourself can interact with Twitter's data. As a result of these changes, on September 27th we will be removing all Twitter Triggers, disabling your ability to push tweets to places like email, Evernote and Facebook.
*These Twitter policy changes specifically disallow uploading Twitter Content to a "cloud based service" (Section 4A https://dev.twitter.com/terms/api-terms) and include stricter enforcement of the Developer Display Requirements (https://dev.twitter.com/terms/display-requirements ).
IFTTT is a fantastic service that basically allows you to connect any online service to any another with what they call "receipes." Lately, recipes for taking your tweets and sending a copy of them to App.net have sprung up.
Twitter is likely taking this action against IFTTT to prevent users from sending their own tweets to this service, which is kind of a dick move, but one I've been expecting since I saw the first ADN recipe.
It's certainly the kind of move we've come to expect from Twitter.