Today, Yahoo changed the pricing for their BOSS search API from free to $1.80 per 1000 queries (the main data source of DuckDuchGo search, and other startups):

Today, Yahoo changed the pricing for their BOSS search API from free to $1.80 per 1000 queries (the main data source of DuckDuchGo search, and other startups): https://developer.yahoo.com/boss/search/ https://developer.yahoo.com/boss/search/ and https://policies.yahoo.com/us/en/yahoo/terms/product-atos/boss/pricing/index.htm https://policies.yahoo.com/us/en/yahoo/terms/product-atos/bo... (the free API "Limited Web" has been discontinued as of June 1st, 2015)