there are almost always freeware alternatives for everything when talking about software, but that doesn't mean that payware has no place in the market. linux is free, but you still use windows. openoffice is free, but most people still use microsoft office. the list goes on and on; just because a piece of software isn't free doesn't make it unviable, and they can be more convenient to use than their free counterparts (although the same can also be true the other way around). most (if not all) of the functionality of clonedvd can be found in freeware alternatives, but clonedvd puts it all together into one package, which can help save time and can be easier to use than multiple programs.
as for the statement "no compression = superior," this is subjective when it involves disc splitting. it's true that no compression will look better, but that's somewhat offset by the inconvenience of having to switch discs (as well as having to burn/store two discs). most people will settle for compression as long as the final product still looks good.
on a side note, "dvd clone" isn't the same program as "clonedvd" (just to ensure that you're reading about the right product).