Distribute industry content with DRM, distribute their own content without, and see what the results are.
Somebody's going to have to perform the experiment to see what the outcome will be. Since Netflix produces tons of content now, they are in an excellent position to try this.
The industry content will show up on the Pirate Bay, and Netflix original content will show up on the Pirate Bay.
Were you expecting another outcome?
The only other possibility that I can come up with is if Netflix's original content has multi-party rightsholder situations with contacts that legally require them to apply DRM even to "their own" content (IANAL and don't know much about how these things work, but it wouldn't surprise me).