I'm not sure if they are social or not , mine pretty much do their own thing and not group up like Corydorus. Mine also sift their sand as well but they def. scoot along with their extra set of fins like gobies.
I agree with you , for the majority , these fish as with many other oddities are not for most people and would probably find them boring. As for me , you have to get a sense of respect for the animal itself , who it is and what it is all about. I do appreciate a nice beautiful cichlid but my love is for the weird and wacky creatures .
How big is your banjo cat ? Do you have pictures or video of it ? Enjoy your banjo !