They aren't giving up on Amazon Pay. There's misunderstanding in this thread about what this announcement is.
Amazon Pay and other payments products from Amazon are customer-facing products that make it easier for customers to make payments. Stripe is the backend software that makes it easier for Amazon to process those payments. They coexist, they don't replace each other.
Amazon Pay and other payments products from Amazon are customer-facing products that make it easier for customers to make payments. Stripe is the backend software that makes it easier for Amazon to process those payments. They coexist, they don't replace each other.