Well first guy hashrate increased with 80 MH in less than a day...it should be a botnet, or they are redirecting slowly the rest of their farm to middlecoin...
probably he is adding one gpu every 10 minutes

NO.
As now he have over 10 000 GC3355 chips which costs 65.5 USD each dedicated to this pool.
He said if payouts continue like this he will slowly redirect all his hashpower into this pool.
His profit per day is already over 10 000 $.
And indeed please exchange the Unexchanged H20! Its taking long..