I want my mobile photography separate from the DSLR photography. If I used Flickr then I would get all photos -- DSLR and mobile alike -- in the stream. The reason I had an Instagram account was I wanted to share which other mobile photo enthusiasts. I have 500px for inspiring DSLR photography and sharing my best with other photogs.

Instagram was where I streamed my day to day mobile photos. My instant life. I've since moved that to Eye'Em but I'm also experimenting with others.

I think Instagram ate Flickr's lunch and then stole their desert. Flickr has very little social compared to Instagram and alternatives.

I no longer have a Flickr Pro account. The user interface and display of photos sucks as well compared to 500px.com. Flickr's UI is 1990's web design. The new app is too little, too late for me but I'll give it a chance. I don't expect I'll use it much.

I used the money I would have spent on the Flickr Pro account and got a 500px.com Awesome account. I shared my personal profile in an earlier comment. My portfolio is here : http://khurtwilliams.500px.com