Also the 5 PHs represents the additional mining capacity they are purchasing, not their existing capacity (5 PHs is ~1.8% of the total network).
I can trust the claim of the 5PH but there are doubts as to their total unverified capacity.
What would the point of that be? If they were to operate a ponzi scheme then they would just take funds from customers to buy the hashlets to payout the mining revenue, there would be no need to buy actual mining equipment.
The point being they can use that receipt as a way to assuage fears from potential cloud mining clients while they continue to sell fractional virtual hashes at a greater profit. It is far more profitable to simply operate a ponzi scheme where almost all users are not seeing a ROI than actually backing up 100% of their claimed hashes with ASIC's.
Fractional mining is so tempting that I would suspect that most if not all companies selling cloud mining are doing this to a degree.