Actual impact of redeeming puntos at Soriana

OK I went into Sorianna today proudly clutching my receipt with 1260 puntos. It turns out they were only worth $100 pesos off my $1426 pesos grocery bill. Not exactly a worthwhile endeavor. Reminded me of "green stamps" 60 years ago in the US when you were given stamps to save in a book when you purchased gasoline to redeem for electric toasters etc. I am not in the US enough to benefit from Kroger's reward system, but routinely I received $40 USD per quarter. But this ain't Kansas