optimized for SFF rigs and HTPCs
That's why. Not really gaming, just a basic card for a specific niche.
Industrial PCs too, fanless stuff is great when you don't want dust continuously pumped through the case, like in a woodshop (sawdust) or a mechanic (oily dirt and dust).
Although personally, in those cases, I think you'd see comparable performance just by using modern onboard CPU graphics. I would rather save the space and money and skip a discrete card entirely.