Sadly nothing.domains (the service by Arsen, poncethecat, binner and NovaFox161) shut down on August 15, 2018.
We (the elixi.re team) wanted to let the domain live on. Arsen and Binner agreed and gave us the domain.
Right now nothing.domains (the service) is no more, but the domain lives under elixi.re, our FOSS image host.
Similar to what we did with kuvien.io members, we're now allowing nothing.domains members to easily get accounts on elixi.re, so you can keep uploading images to this domain (or our other domains). Simply read the rules, and if you agree just apply for an account on our site and join our discord, say that you used to be an ND member and your account will be activated. We have an online uploader and configs for ShareX and KShare. We also have upload scripts for Linux and MacOS.
Links: elixi.re, elixi.re rules, elixi.re source code, elixi.re discord, elixi.re patreon, elixi.re liberapay.