Even if all the 55nm do is act as proof we got something working and get some hashing power to generate some coin and are the proof of concept for the 28s would be a positive.
This is no different than Ken buying hashrate from CEX.IO - pointless waste of money to fool you into thinking shit is happening. If not an outright lie, the 55nm chip has nothing to do with Ken besides his money. It is another guy's failed project - perhaps successful technically, but way too late to market to be profitable. That's why Ken got to buy it. Other companies aren't stupid, if there was money to be made on those chips, who in his right mind would sell?