To be honest, Intel's AMT is a bit of a PITA, but the Orange Boxes were assembled to have some resemblance to real racks of hardware. So remote out of band power control is essential.
There's something quite magical about using Juju and MAAS on the Orange Boxes and seeing the LEDs light up as you scale out a service (e.g. juju add-unit -n 5 nova-compute).
The redirect I found on https://www.google.com seems like it did have a whitelist. Luckily youtube.com was on the whitelist, so I could re-use the exploit from there. So even whitelists aren't totally safe (and YouTube isn't using the redirect for known friendly sites - seems to be more for tracking purposes).