I just had a conversation with the Bandcamp support team because an album I bought was removed from my library.
Turns out both Bandcamp and the seller can remove any purchased music without notifying the customers. That would have been nice to know before I spent money...
Bandcamp recommended making a backup of any purchases to avoid loosing them. A little bit too late for that.
For free music that wouldn't be an issue, same for a streaming service like Spotify, but if I paid €10 for an album I would expect to have access to it.
It's very disappointing since Bandcamp is an otherwise great way to support your favorite artists.