Found all of our miners http://eligius.st/~wizkid057/newstats/userstats.php/1swrtyBsp9odruX65upeyubAVSAyggh78 
How do you know this is AMTs bitcoin address?
If it is then holy shit.
Tracing this wallet around might not be a bad idea. Find out who it belongs to. Blockchain should be able to clear that up.
FYI based on blockchain it does not appear to be theirs.
Out of curiosity What did you see that made you think that isn't their address.
I looks to me that the 1rst deposit to that address was 1/30/14, coincidentally about the time they got the chips. also the hash power appears to ramp up and also there are several large deposits from other groups of addresses, as if miners were paid to a unique address and then transferred to this one. That is what I'm seeing but not that experienced looking at the blockchain.
Now, on the AMT ones, or any other make for that matter... I like the suggestion earlier on - the customer gives a wallet or pool name to them and AMT does the testing into there. Customer see's right away if there is activity on the accts and knows things are in-progress.