Also just anecdotally from my contango experience: all market participants, be it traders, tank owners, wholesale end users or railcar guys know exactly where the carry spread/contango is; you won't be catching too many people off guard

As things might appear to widen out on paper, they'll want to split as much as they want of the storage PnL as possible which dampens trader enthusiasm on front end side to store it.

So here is an example: I see prompt product (say ethanol) to June is 6.5 cpg; I try to find spare storage and my CP sees that spread but offers lets say .05 cpg per month higher; he wants his cut too. This changes my projected Pnl but ok we are still making money.

I got to my boss @JordanFife1 or @MarkKaeser and tell them the plan--they respond, well with slippage (buying the product) we might lower than PnL a bit more (carry markets get choppy too) not to mention tying up all that cash for a few months. Now might re-think storage play