IFTTT CEO Linden Tibbets:
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. All Personal and Shared Recipes using a Twitter Trigger will also be removed.
I don't think anyone objects to the idea of Twitter going in search of a business model. Seeking to make that work by progressively making the service less and less useful to a subset of their users while chasing the mainstream seems like an odd decision to me.
Remember when TV shows had links to AOL keywords or MySpace pages on-screen? The mainstream is fickle, Twitter. You may live to regret this.