I wandered across https://www.deviantart.com/kyoht/art/The-Collecting-Tree-18036082
and noticed the DA username on webpage was strikethrough-ed. (ie. kyoht )

Clicked on the username, and https://www.deviantart.com/kyoht
is "Deactivated Account".

So if you come across a Deactivated Account at DeviantArt,
there may be some art in their account that is still available.

Example: That kyoht/art/The-Collecting-Tree-18036082 webpage also links to
https://www.deviantart.com/kyoht/art/Wall-Flower-204115767
https://www.deviantart.com/kyoht/art/Get-Better-Bunny-332881060
https://www.deviantart.com/kyoht/art/Prom-Night-204114609
etc etc.

Searched e621 forum and don't see this (phenomenon?) mentioned in other forum thread(s).

(EDIT: and art in kyoht account shows up in deviantart search, so that's useful
https://www.deviantart.com/search/deviations?q=kyoht )

(I assume Art Talk is the correct forum category for this)