I run a small ebook publishing company which publishes both on cloud-based services and DRM-free stores , and I don't think you're identifying the right problem.
Piracy is a concern in movies and perhaps in music still, but in ebooks hardly at all. Perhaps it's an issue with bestsellers, college textbooks and IT books, but not most of ebooks being published today.
Fear of piracy is perhaps an issue, and that's why major NY publishers and technical publishers rarely publish on DRM-free platforms like Smashwords. Frankly, though, most authors also publish on the cloud-based services even it if includes DRM. The reason is mainly because Amazon, Google Play Books and Apple store have more mindshare. Perhaps in sci fi, fans are sophisticated enough to seek no DRM, but most consumers don't care or even know about that.
The two biggest problems as I see it is 1)the market power of Amazon to set prices and royalties and 2)the high cost of marketing and promotion. Unfortunately Amazon has so much power that many promotional services become dependent on Amazon to do marketing. Actually a 3rd problem is the declining number of newspapers and magazines that hire people to write book reviews. This is offset by some amazing online litblogs and online book review services and now podcasts, but it's still an uphill battle.
Bookstreaming services like Kindle Unlimited have made some headway, but they are still somewhat pricey. KU is often bundled with device purchases, but I don't see a lot of people paying 10 dollars monthly just to read ebooks.