I believe right now, it's more important at figuring out who is mystery miner.
Who says it wasn't simply someone who purchased a ton of shares on gpumax?
The GPUMAX system software. It only allows people to direct the hashes purchased to already established whitelisted pools to avoid that kind of situation.
No, as far as I know it would do nothing to stop the stolen coins from being 'laundered' on gpumax. Not that I am saying GPUMAX should do anything, but it does not take much of a brain to do it.
1) make new account on whitelisted GPUMAX approved pool
2) purchase new hashes on that pool at GPUMAX with stolen linode coins
3) receive clean bitcoin from pool
(legitimate GPUMAX work seller now has coins with linode history)
Anyone with half a brain could do this with minimal risk of being tracked.