No big deal, if they can buy a cheap low-value feedstock and make it into something of higher value, what’s wrong with that? Years ago, restaurants etc had to pay someone to come and pickup their “yellow grease” aka used cooking oil. Now, biodiesel refiners pay for it and there is a whole new market with strong demand for a very limited supply. That’s economics.
If oil gets to $10 or less per barrel, there will be no use for biofuel, solar,wind or nuclear energy. It will be too expensive to keep them afloat even with taxpayer subsidies.
And for some reason my truck has started smelling like garlic when it runs.