Fertilizer actually has pretty decent margins, especially lately what with cheap natural gas. In any case, I suspect it would behoove whichever company had the necessary access to capital to invest in such tech.
If enough LNG export terminals get built, that advantage goes away. Our prices will go up, and their prices will go down.
The oil refining industry demonstrates how bad things get in a capital-intensive industry when both the inputs and outputs are fungible. They had flush times, too, in the mid-2000s. That was also temporary.