This is an interesting way to go about implementing DRM in the form of Denuvo - include it in one digital store release, but don't use it on another. This is what Bethesda has apparently done with the game, releasing a non-Denuvo enabled version of the game on their Bethesda Store, whilst offering a Denuvo-inclusive version on the Steam Store - without warning users of this feature on the platform.

After considerable outcry from buyers of the game, who weren't made aware of Denuvo's inclusion, Bethesda has promptly removed the DRM suite from the Steam release, meaning that it is now at parity with the version being distributed on the Bethesda Store. Whether the non-inclusion of Denuvo on the Bethesda store was a matter of making the wrong executable available only the company knows, but it's strange to license the DRM for a single store release - and Bethesda sure didn't include it "accidentally" on the Steam version, which makes the act of not listing it a debatable one. Of course, with one version not sporting the DRM, release groups have already started distributing the game in a cracked state, which obviously invalidates any protection Denuvo might provide.