The many developers who use the Twitter API have built thousands of creative applications that have certainly exceeded anything that Twitter's founders could have initially imagined when the API was released (for examples of some of these applications, check out our growing list of hundreds of mashups that use the Twitter API).
Location-based social media analytics company GeoFeedia attempted to abuse the public data streams it receives from other social media platforms by monitoring the public, according to documents revealed by the ACLU. This article on Techdirt discusses the issue, and how the major platforms responded.
Amazon Web Services (AWS) has announced that the AWS Price List API now provides pricing information for all available AWS services. AWS also announced customers can sign up to receive API notifications for AWS services information such as price cuts, new services, and instance types.