Response from Zach Stone of DSS
Thanks for your feedback!
DSS is a proprietary software, but you do own the website design we create for you, all the content we write for you, and anything content you create through DSS. If you ever did have to make a change, rest assured that you'll be able to take everything you've done with you.
This is something we do that most companies don't because we feel like it is the right thing to do and that's what we're all about.
Thanks again and let us know if we can help in any other way.