Coming in January a new site called 2mblr will be launching as an alternative to tumblr, allowing adult content. You can already view my past tumblr posts on 2mblr here https://2mblr.com/malecelebfanfiction but I won't be able to post any new content there until the site fully launches.
Another site planning on trying to fill the void tumblr has left is https://www.cumblr.com/ which plans to be a blogging site focusing on adult content. It also isn't available yet, for more information visit the site to see their latest information update.
I'll be trying out both sites when they launch to see if they'll be a better way to post new content and connect with my readers after the tumblr ban.