borrowing on a hard asset has to be for reasons related to liquidity, risk must be low

a clearinghouse or bank may need to borrow, in order to cover a temporary shortfall with expected income arriving later

so you could expect also that the fee on that loan would be high

also i'm sure you know that any contract with terms that can be varied unilaterally are usury... so there's that to think about as well... the hard asset disciplines this a lot