^ Well there are people who prefer absolute silence and go to any heights to replace any and every fan with passive solutions.
Either way these arent intended for performance oriented users, they'll be much better off with Antec TP2s and NeoPower HE's. I guess this would serve those who intend to set up HTPC's , Media center PC's, or just need a medim-powered silent rig. The efficiency of these PSU's also tends to be on the higher side, so lower electricity bills as well.