This is the standard quality of the iPhone 5C Display for those who care mostly for a working display and not care if it looks like the original or not.
The iPhone 5C Display consists of three parts: The frontglas, touchscreen and LCD. These are glued together and cannot get exchanged separately. So you have to buy always the whole unit, even when there is only the frontglas broken.
The unit fits for all iPhone 5C, just the backside have different colours.