Has anyone picked this up? It claims it prevents dust from getting inside the Mini. I'm considering it for that reason alone, if it is effective. And I love that the power button is at the front. So much easier to get to.
I built a rough custom version of that basic idea for my (now retired) 2012 Mini a decade back.
Imperfect as it was it worked very well. Only maintenance was to remove and rinse the filter out every month or two. After about 7 years of running 24/7 there was only a slight coating of fine dust on the edges of fan blades and on a handful of other edges and corners in the air flow path inside the Mini.
How well that commercial version does the job remains to be seen. But no question the basic idea works very well.
If that version does work and is reasonably robust, then I highly recommend getting one. 10/10.