Thank you for the detailed numbers, very interesting to see the differences.
I think the people that buy these contracts are well aware of the risks, and as with all investments, risk is not something you can put aside.
People are satisfied as PBmining delivers week on week payments, and I'm sure they will do so in the future as well.
It's up to PBmining to decide whether they will demonstrate their hardware or not, for me personally it won't change anything.
They don't even need to demonstrate the hardware, they just need to demonstrate the 2.7PH/s of hashpower they have. That much power is pretty apparent on the network, it's about the same amount as Bitminter or P2Pool. Where are the blocks?
https://blockchain.info/blocks/CloudHashinghttps://blockchain.info/blocks/KnCMinerhttps://blockchain.info/blocks/Unknown%20with%201BX5YoL%20Address (Cointerra)