Because ecah purchases with APT is given its own repayment schedule
CC give you "up to" 55 days interest free, depending when you make you purchases in the cycle some of those purchases may recieve less than 1 day interest free.
APT each unique purchases recieves its own cycle for which repayments need to be made.
Unlike credit cards the full balance owing does not need to be paid off at the end of the cycle to avoid fees.
Also if you want to make the most of interest free periods you can simply pay your APT account with a CC therfore extending interest free periods up to 111 days.
Also still earning CC piints such as air miles/flybuys ect
but you already know this piggy, just repackaging old arguments from yester-year.