While it has been covered in many other places across the Web (start with Marco Arment, then Ben Brooks), Twitter's API changes today should worry any social marketers who use tools and technologies that interact with Twitter.
In Twitter's announcement, they state that they are not going to penalize "Enterprise Clients" and vendors of "Social Analytics" -- every quadrant but the top right of their visualization, below. However, Twitter did not clearly delineate lines between what is and is not acceptable. To continue to grow, Twitter needs to encourage a robust and healthy ecosystem, which supports both marketers and users.
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