The Tumblr link is also not working for Atlas.
Hey there, thank you for reaching out! I'm not sure what's going on with their Instagram but here's an active link to their art tumblr: https://www.tumblr.com/b00k3t
I'll reach out to them re: their socials and get the credits page updated, I'm not 100% sure what accounts are active/in use for them so it sounds like a great opportunity for an update lol.