i kind of see a place for cases like this. its not a space most people here are in but consider a moment someone who has a large computer, they want to downsize, Chassis like this fill a space where they can move from a platform that cant really be downsized (ATX mobo, 3.5" drives, big GPU, whatever) onto a platform that can be downsized once they get bored of their not-quite-SFF chassis. For a time i think over-sized mITX cases are going to serve an important role in getting people to SFF, if for no other reason than them acting as a stepping-stone getting the core hardware (mobo, gpu, coolers, whatever) people are using down to a size that they can actually do something with in the SFF space.
TL;DR: if were going to assume most people are coming to SFF from LFF then we need to accept that oversized cases can and may well play an important role in transitioning people into an SFF community over time & remember sometimes when we look at these things their not always aimed at us, their not always preaching to the choir.