CD-R for this kind of release is a bit of a gray territory, I don't add them too. There are a few of them in the db though (with scans, identifiable with the text above the barcode 'Manufactured by Amazon' on the back). WaterTower does that when they think a normal physical release won't sell enough to justify the costs.
universalgenius12, if you don't own the CD-Rs, likely a better idea not to add them.
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