I guess I should have clarified why I go that route.
I certainly am not a production scale processor and I don't use the pour off method.
My MKiii runs 2-3 times a week at the most with 5lbs of solvent in the tank. For my personal situation, getting a Ecogreen tank would draw more attention than picking up a a few cans every once in a while.
The friends that produce on a much bigger scale go with the tanks, but yes it gets distilled either way.
I see no reason for guilt in loading a CLS with cans rather than from refrigerant tanks like Ecogreens, but do beware, Ecogreen doesn't ship discreetly! Your delivery driver is going to know something's up...