IDK my eel-tailed cats well at all. If you are talking about eel-tails in general then yes people keep them, especially in Australia. I got two too.
If you are talking about this particular species, then... if this is Neosilurus ater, I've seen them a handful of times on MFK, PCF. This particularly pretty one comes to mind: https://www.planetcatfish.com/forum/viewtopic.php?t=33204
Oooo I think that is the right sp! It's my first time seeing the golden ones around. I've seen the black/grey ones at an aquarium before. They look real interesting, thought I'd share.