I have taken a hypothetical brand 'K-Mart' that wants their customers to sign-up for its credit card services. During the payment process through the website, I have tried to advertise the benefits of the service with various offerings and sign-up bonuses provided. Just below the primary Call to action 'Pay Now' I have added a Secondary CTA which redirects the customer to the signup page for the credit card service.
On the bottom screen there's a banner highlighting the key benefits. Displaying the main selling point might get the website visitors intrigued and may turn them into potential customers. A physical card is also displayed at the bottom right corner to give a reference to the visitors or potential customers.