If you based it on the $1,000 gift cheques:

135,000/$1,000 = 135 points per dollar

15,000/135 = $111.11

$111.11>$91.56

So yes, if you want to buy the gift cheques for future visits it is better than break even. Notwithstanding that you earn additional points for this stay and future stays with the gift cheques in turn further lowers the 135 points per dollar value.