No, we do not. Based upon our experience, we believe that its better for readers and ultimately for publishers to avoid Digital Rights Management (DRM) for these types of projects. However, once you've saved your project to the standard epub3 format, you may choose to apply DRM if you wish.
We do automatically include an attribution and link-back with any text copied from books published here. Try it by going to a book like this one and copy and paste some text from the book to somewhere else and see that what you pasted automatically contains an attribution and link back to the book - it's pretty cool.