The Twitter API has taken a winding road since its initial launch in 2006. Since 2012, Twitter has continued to clamp down on API consumption and usage, often to the dismay of the developer community. However, Twitter continues to understand the value of API features to its growth and the developer community.
Facebook-owned Instagram has broken apps and surprised developers by substantially reducing the number of API calls allowed per user per hour. According to reports, the rate limit for the Instagram API was reduced from 5,000 per user per hour to 200 per user per hour this weekend without warning.