Originally Posted by
Dr Jabadski
Absolutely reasonable to apply for a card just for the SUB (even a 5 day quasi SUB) which is often far and away the major determinant of the choice of a credit card application. Granted with Bilt’s unique ability to pointsetize rent and condo payments, Bilt’s quasi SUB might be less of a factor but it’s still a SUB and
it’s all about the SUB 
(for many people).
mia's caveat here was "the SUB isn't guaranteed", but the poster had indication it was happening.
That said, the SUB can't have been completely unused - presumably even without resetting the limit, you spent up to the limit at least ONCE, so there's some use of the SUB?