Search engine was never Yahoo's core business. Being a portal is and it's still top dog in that area. Dropping Bing to make their own might not be a good idea

Search engine was never Yahoo's core business. Being a portal is and it's still top dog in that area. Dropping Bing to make their own might not be a good idea as building a crawler is a multibillions dollars business and Yahoo might not have the financial nor technical will to commit to something high risk. It's true that Microsoft is benefiting more from its contract with Yahoo. Bing is powering Cortana and Microsoft's other big data services. Having Yahoo's traffic is indeed beneficial. If Yahoo continue to see itself as a "media" company, perhaps buying Vimeo might be a good way to get there. The web can sure use a competitor to Youtube.