https://arstechnica.com/gadgets/2017/08/bing-is-bigger-than-you-think-microsoft-boasts-at-33-of-us-searches/

— Bing Ads (@BingAds) August 17, 2017

We've known from Microsoft's financial reports that Bing has been growing. The search engine became profitable in the third calendar quarter of 2015, and Microsoft says it has continued to grow both the market share and revenue-per-search since then.