The hype around mobile photo editing and blogging services Instagram has overshadowed Yahoo! Inc. (NASDAQ:YHOO) subsidiary Flickr.com. Instagram hit 3 million mobile users in less than 3 months. One of the biggest reasons why Yahoo! let these two services surpass Flickr on mobile devices is because of “Innovator’s dilemma” according to Kellan Elliott-McCrea. Kellan was a former Architect at Flickr, but now he works as the VP of Engineering at Etsy.