You are right, Dalig, I have no experience with snake-oil cables. But I *do* have almost 30 years as a Ntwk. Admin/Programmer and I know that either the cable passes the bits or it doesn't. Bits is bits, folks, and NO amount of money will cause 2 sets of identical bits to sound different from each other. Any mfgr. who tells you so is, flat-out, a liar.
If you want a great cable without paying stoopid money, check out this AudioQuest for $35 delivered:
http://www.amazon.com/gp/offer-listing/B00415AHFS/ref=dp_olp_new?ie=UTF8&condition=new
Folks who spend uber-bux on USB cables have far too much disposable income...
-RW-