We will know more in the future. Right now the volume in PGRX tells the entire story: no interest. And what they need to make this work is a high level of interest from outside investors. Bottom line: they need to be able to sell shares to make this work. But at the current volume they can't even begin to sell shares without killing the share price below NASDAQ listing requirements.
As for Sichuan Chemical, they have more than likely used any contingent agreement with PGRX for a price leveraging tool. Now they can go to PGRX's competitors and say, "We agreed to pay this much for PGRX potash, can you beat their price?"
PGRX may do well, but I think it heads down to bankruptcy by year's end. Or, due to lack of interest, they start selling huge amounts of shares and drive the share price into the ground and de-list to the OTC. FWIW. GLTY.
