With the current demand for pellets, that 16' storage container is a drop in the bucket compared to current demand.....
Thought I'd have some fun with some napkin math.
Not at home near a case of pellets or the 16 foot storage container so rough estimates from memory on dimensions......
A "case" of typical large tin JSBs takes up roughly 576 cubic inches (12inches long x 8 inches wide x 6 inches high). Within that case there are 30 tins (6 "sleeves" of 5 tins each) @ 500 pellets each so 15,000 pellets. Or, in the case of a million pellets like you suggest, 66.67 cases (1,000,000/15,000).
16foot x 8 foot x 8 foot shipping container is 1,769,472 cubic inches (192 inches x 96 inches x 96 inches).
So a 16 foot shipping container could theoretically hold 3072 cases of pellets, just by volume. That would be 46,080,000 (15,000/case x 3072 cases) pellets (over 46 million).
In reality, of course they can't fill a shipping container to the brim, because the top cases would crush the bottom cases, and I do believe the overall weight of the container might be a bit of a problem. So, assuming they only fill the bottom with pallets roughly waist high like we see in the pics Predator international shares, lets call that half of the volume of the shipping container. We're still looking at 1536 cases of pellets, or 46,080 tins of pellets, or 23,040,000 (yeah, 23 million) individual pellets.
Lots of pellets in a shipping container. I've got a decent supply, likely more than most, and I still can't fathom how it would take very many shipping containers of pellets to keep up with demand. of such a niche market.