I had the worry intially too. But after signing up, I got to not only watch Titans but I've been binging the Constantine show (I never saw this before), Lois & Clark, 90's Flash, Young Justice (also never saw this) and I've been having a blast. Of course, if you already own all these or have seen them, then the value is different lol
I own a lot of the content on there on DVD, but I'm enjoying the convenience of streaming it wherever I am without digging out the dusty old discs. Lots of new content coming this year though, so I hope they give you a reason to sign up Buried! It's a young service, but I think it has loads of potential (it just needs to be on more devices).