Bing search API terms of use do not allow caching [0].
"You must use results you obtain through the Services only in Internet Search Experiences (as defined in the use and display requirements) and must not cache or copy results. "
But they may have a special agreement in place due to the number of searches happening on DDG (100 million + daily [1]). They're larger than Bing in many countries.
"You must use results you obtain through the Services only in Internet Search Experiences (as defined in the use and display requirements) and must not cache or copy results. "
But they may have a special agreement in place due to the number of searches happening on DDG (100 million + daily [1]). They're larger than Bing in many countries.
[0] - https://www.microsoft.com/en-us/bing/apis/legal
[1] - https://duckduckgo.com/traffic