Before being so arrogant and rude perhaps you should check your facts.
$22.58 Vs £5.92 for an edimax BR-6214K
So which is cheaper?
Random american price vs actually hunting one down at a reasonable price for two bits of plastic vs a switch so cheap it'll break in six weeks. Sorry, not convinced.
Now show me proof that using the the 4 cables reserved for eliminating cross talk wont impact performance.
They're not cables, and they're simply not used. At 100Mbit it won't be an issue for normal (<50m) runs, and quite a few industrial setups do things like this.
Please note I am not saying it's a good idea, I'm strongly opposed to it, but it
does work, and FUD doesn't help.