PayPal is offering $5 off a $5 purchase at Subway to the first 350,000 customers using this promo before November 15, 2018.
All you have to do is click on “Save Offer” to save the deal to your PayPal Wallet. Then shop through the Subway app, choose to pay with PayPal at checkout and your free $5 off will be automatically applied to your purchase.
The promo didn't start until 1pm ET today, so I'd imagine this will be available for at least another few days. I don't see it lasting until Nov. 15 though.