I don't think DLD/DRD is conflicting with the statements given in the post, as DLD only concerns itself with metadata (and yes, that can be harmful), and the article talks about the actual data. Both are important, but different, topics.
I was more objecting the very marketing-y-and-not-very-truthy quote.
That said, digging a bit more into Jottacloud does not make me any more likely to use the service, for anything I would be concerned to store at, say, Dropbox:
Their FAQ is (intentionally?) vague. How do they encrypt stuff?
"all datatraffic between your computer and Jottacloud is encrypted with 256 bits AES high grade encryption, which makes it virtually impossible for unauthorized persons to use the information being sent.".
And then:
"If you log into www.jottacloud.com it’s possible to download, view pictures and share files with friends and colleagues"
Well, after reading Snowden's comments about what is available (everything) - it would seem that DLD goes hand in hand with storing all traffic for a limited time -- you would need help searching that to actually recover something.
I meant - if you already, illegally store everything - that everything is problematic to search, and to store permanently. If you also, legally, through DLD store metadata, then that makes your illegally collected data more useful.