We always talk of shorts as being BTS bulls getting leverage to BTS.
Instead we can promote BTS widely as a way to obtain general purpose loans. Anybody that holds BTS can use it to self-create bitUSD (as one example), then swap that bitUSD for real USD to use for any purpose they desire. That works particularly well I think if the collateral requirement is reduced as proposed.
In effect, somebody is using their BTS as collateral to borrow up to 50% of that value for whatever they like. To repay the loan they use real USD to buy bitUSD and self-cancel their loan.
[They have to be careful in managing collateral though to avoid getting called].