Ten to one (marbles only) you didn't reasearch that!
That seems to be the same consensus for a lot of fuel/oil related subjects!
A lot of folks take the standpoint that Propane, Diesel and other "by" products don't have to be refined and treated.
It sure won't stay in the liquid form it was compressed into without the tank it is in.
How did it become liquid and separated from the gasoline, diesel, or any other one of a kazillion "by" products of crude oil?
The same argument can be repeated for diesel fuel, people seem to think that any of those products are free and "left over" from the refining processes of gasoline, while each and everyone of those products is refined out of the crude it was, and then modified (refined again) to become what it is.
Not so, some products take a heck of a lot more treatment to become a "by" product then others.
Profit making is the bonus for the refineries as they were lucky to have done in the last four years, but buying back the stocks they sold to stay afloat was a major expense and cost them most of those profits.
They spend Billions on operations and therefore make Billions also. But in general I am under the impression that they struggle just as hard as the next guy to survive.
Fair is fair.
PH.