True enough. Most all small stores (eastern USA) have card readers that also take contactless payments. Thing is, for larger stores, e.g. Target, the small service fees handed over to Apple and the CC companies really start to add up when you have that kind of volume moving across your registers. Small stores barely feel it. For large stores that's a potentially big source of income you are missing out on. Hence, you try to go it alone (Walmart) or you try to cut the best possible deal to keep the most you can (everyone else). So yes, Target is rolling out ApplePay, and likely other systems as well, I don't know. Big win(s) for the ubiquitous, non-merchant specific NFC payment systems. Us LTE AppleWatch wearers continue to win freedom from our wallets and phones ;-)
The cut Apple gets come exclusively from the card issuer, not the retailer. The retailer sees no difference in the fee they pay regardless of whether you insert your chipped credit card or use Apple Pay.