ok, i may buy your argument from a perspective of a brand new cloud storage provider that's try to come up online and break into the market, but you're telling me that Dropbox, OneDrive, Box., etc., are all indie developers living in their parent's basements? These companies made a conscious choice not to offer encryption and now got the rug pulled out from under them. steve jobs famously said that this "Storage" is just a feature, not a product, and now they've proved it.

additionally, as far as i can see, those apps all free to download and you can buy their plans outside of the apple ecosystem and thus they get a free ride in the App Store without giving away any cut to apple.