most TS dont realise the fault or issue of an item until they bought and used it.
either from cheap keyboard to an expensive brand....no matter what item people bought....it can be a psu,casing fan,ram,hdd and etc etc whatever brand it is
when it start to give problem or issue that is where TS shared it in the forum.....useful feedback may help people to avoid it or take precaution of that particular product.That also show how good is the quality and realibility of it.if nobody inform about the particular product still people will ask/query about it at forum too