If it was the case that emojitracker was reselling that api access, I could see cutting it off. But I think that a rich, robust ecosystem would flourish more a

If it was the case that emojitracker was reselling that api access, I could see cutting it off. But I think that a rich, robust ecosystem would flourish more around a platform that provided free API access to noncommercial projects. Of course, it's conceivable that this API access costs twitter a significant amount of money - it is a lot of data, after all. Even a low cost could be written off as advertising within the platform. "Look at the cool stuff we could build on this API, let's make a commercial product and pay twitter for access!"