Some of them are, there's a fair amount of subcontracting in the crank market, especially at the low end. Andel, PX and BLB don't manufacture, Sunrace-Sturmey-Archer do, as do Stronglight although they also buy in some of their cheaper models from the far east.
Is there a good low-end crankset which isn't dumb?
Anything square-taper needs to be a lot cheaper than Shimano FC-S501 to be worth the trouble.
Some of them are, there's a fair amount of subcontracting in the crank market, especially at the low end. Andel, PX and BLB don't manufacture, Sunrace-Sturmey-Archer do, as do Stronglight although they also buy in some of their cheaper models from the far east.
Anything square-taper needs to be a lot cheaper than Shimano FC-S501 to be worth the trouble.