I don't think a discussion of optimality is relevant to what I wrote.
Lots of people with good credit are not maximizing credit card rewards and sign-up bonuses, either. Humans are not homo economicus. (And just as a factual matter, there are sometimes longer BNPL terms than 3 months, which changes the math on what is "optimal.")
Lots of people with good credit are not maximizing credit card rewards and sign-up bonuses, either. Humans are not homo economicus. (And just as a factual matter, there are sometimes longer BNPL terms than 3 months, which changes the math on what is "optimal.")