"Its payments are also routed from the retailer to the ACH system instead of the credit card system, which saves retailers from having to pay interchange fees (typically around 2% of the transaction amount)"
If I only have my phone which I have android pay on and I need to get something from a drug store, I would go to CVS but they don't accept NFC. So I will have to go to Walgreen's instead which is usually near a CVS. So I don't get why they don't offer NFC, because keeping 98% of the transaction amount is better than 0.
What matters to a retailer isn't the revenue, it's the difference between costs and revenue.
In the real world, its about profits, not volume.