Well I just ask myself if it is beneficial to actually have one for a racing sim.
Does it make you faster? --- Probably not. People use shoes, plain socks, sandals, whatever... having anything that slides on the pedal or grips on the pedal is all up to driver's preference, and a SimSox is no different than just padded neoprene. Not all fast drivers use a SimSox, it really isn't a
necessary item to have, that is what I am getting at here.
Does it really make you that much more comfortable? ----Probably does, but I guess if your foot has arthritis or you grow tired in short or long races, then maybe it might meet that criteria for a buyer.