this is not really a commercial term, but a technical term to define the amount of usage (outstanding credit balance) and/or available credit one does or does not have on their credit card.
however this can be a very good domain if developed.
there is virtually no organic SEO competition for this domain. further some of the OVT results indicates that this term, is used from the consumers point of view. conversions will probably be low (passive traffic), but leads are worth dollars in this industry.
low XXX for this three word domain.
higher if developed or to end user.