A Harvard study estimates that people who pay with cash and debit cards are subsidizing $30 billion a year in points and rewards for credit card users. https://www.nbcnews.com/business/consumer/credit-card-perks-hurt-shoppers-pay-cash-debit-rcna346905?cid=sm_npd_nn_tw_ma&taid=6a1dac882b694b000150265

A Harvard study estimates that people who pay with cash and debit cards are subsidizing $30 billion a year in points and rewards for credit card users. https://www.nbcnews.com/business/consumer/credit-card-perks-hurt-shoppers-pay-cash-debit-rcna346905?cid=sm_npd_nn_tw_ma&taid=6a1dac882b694b000150265

A Harvard study estimates that people who pay with cash and debit cards are subsidizing $30 billion a year in points and rewards for credit card users. https://www.nbcnews.com/business/consumer/credit-card-perks-hurt-shoppers-pay-cash-debit-rcna346905?cid=sm_npd_nn_tw_ma&taid=6a1e0597abb4210001d087b