Sounds interesting! Unfortunately for me, apparently a lot of people are interested in this: The images aren't loading and I'm getting a firebase error in the console.
FIREBASE WARNING: Specified Firebase has reached its Peak Connections limit. If you are the Firebase owner, consider upgrading. (https://resplashed.firebaseio.com)*
Hmm... didn't work then started working for me. It appears re:splashed is just sourcing (i.e. hotlinking) from unsplash [1] anyways. Reusing the images is fine under CC0, but I'm not sure if unsplash cares if re:splashed is hotlinking.
http://vastpic.com/archive
Not saying that it's not worth subscribing to if you like the style of images though. :)