Ac/dc on Spotify

Ac/dc finally relented and joined Spotify...however it appears they didn't use the temasters... Anybody confirm this?
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I just received an email from Tidal stating that AC/DC's complete catalog is now available from them.
Confirmed.But do we know what sources were used? It appears they used the original recordings...not the most recent (2002?,) remasters...anybody have an update?
AC/DC is also on Apple Music.