I tried to add a Qobuz link for Natural Causes as “purchase for download” relationship, but there’s an error message saying: “Some relationship types are missing for this URL”
Sorry to hijack, but the problem OP displayed is an issue for releases that are download-only on Qobuz, such as this one: https://musicbrainz.org/release/d2c25e29-850d-408c-b074-1814b99ba5bc
I was forced to set the streaming relationship just to get the link in the database at all.
I’ve also had this issue. Some Qobuz releases are purchase only. It’ll let you add both, then go back and remove the streaming. However, it’d be nice not to have to do it this way.
The website currently auto-selects “streaming” relationship type which is the most common and allow for additional relationship of type “download”. But it doesn’t allow for “streaming” alone indeed.