Clearly not prepay. Reconfirmed in fact it wasn’t booked as a prepay.

That said I spoke to Budget who told me that “certain” Budget locations bill before rental begins and charge a security deposit at their discretion, citing that the BWI location is one such location. Finally I was able to contact a coworker who experienced the same behavior at BWI.

In any case reviewing the rental terms and conditions supplied when I booked the rental, none of this is stated point in fact.