Key insights: Affirm partnered with Worldpay to boost its distribution; and with New York Life to sell its BNPL lending volume. What's at stake: The BNPL fintech is battling rivals such as Klarna and PayPal for merchant and consumer support. Forward look: Affirm reports earnings Thursday. As it battles buy now/pay later rivals like Klarna and PayPal, Affirm is adding merchant and financial scale to bolster its installment lending.   Affirm has signed a distribution deal with Worldpay, and expanded its relat ...