Very little information on the site -- how does this work? Presumably by storing the contents of every Reddit comment made since Decomment's creation and servin

Very little information on the site -- how does this work? Presumably by storing the contents of every Reddit comment made since Decomment's creation and serving them up on demand? I imagine once you delete a comment on Reddit it's no longer available via the API or by scraping the site, but I was hoping something more interesting was going on than just storing comments in a separate database before they are deleted.