Outside of the moral and ethical issues regarding real fur— many retailers don’t even carry it, such as Selfridges, Net-a-porter, and I believe Mr. Porter (among many others). So right there is a huge incentive to use faux fur.
Further, faux fur gives the designer more control over the nuance and aesthetic of the fabric, and (especially with the unique viscose blend variety offered here) is a process that can sometimes be close to the cost of real fur, and in some cases even more expensive. It’s not as though using faux fur is automatically a money grab. The stigma against faux fur is largely based on perception rather than actual quality or aesthetic.