if you guys actually understood the product you would understand afterpay takes on all chargeback and fraud risk as well.
https://www.digitalcommerce360.com/2016/10/28/cost-fraud-76-online-retailers-revenue/
http://www.pymnts.com/news/security-and-risk/2016/merchants-fraud-costs/
also myer wouldn't be paying 6%, more likely close to 4%. If as afterpay is saying in all its presentations that their customers have between 30-50% bigger basket sizes than the next payment type, it is worth it to retailers.
but yeah, i guess the fact that they've built a network of 7,200 merchants essentially all through inbound calls shows that their product is failing