I dont think so? As far as I can tell, my account still works and I bought an album there the other day.

It looks like the company has been sold around a few times in the last few years and i think its gotten worse, but I honestly cant tell lol

If you can, and they have it on there, buy your favorite albums on Bandcamp, then they are yours forever

IIRC it only suports plain text files / Markdown rn. Not supporting EPUB is a non-starter for me. I use my Kobo right now and love it. If they add EPUB support i will heavily consider building one.