I am a Flickr Pro (paying user) too … though I have not uploaded & back-up to Flickr since forever, using Dropbox for more and more of that. But, like you, I will probably continue to pay, for similar reasons.

One service that seems particularly interesting is Snapjoy. Check it out: https://my.snapjoy.com/ or https://dazmsmith.snapjoy.com/albums/210110744814185206

There are a few features I’m still waiting for. But the service is slick, works and is mobile and Creative Commons aware. It’s pretty impressive.