How can I prevent discount code usage with Affirm financing?

[MSchaffer30]

HI all, 

I offer Affirm financing on my site and I also want to be able to add a discount code for 10% off.  I do not want to allow people to use the code and Affirm together though because it would put me in the red on products. How to I offer something like "10% Off or 24 Months financing through Affirm"? Or just not allow people to use the code if they are using Affirm?

Thanks

[heckyeahb]

As far as I can tell, no. I've been using Shopify for about 10 years, and I agree that this would be a great feature. If folks are using 24 months financing, they shouldn't also get to use a discount code because you're paying a higher rate. Any way that I can think of to exclude Affirm users from discounts creates a ton of friction in the purchase flow that might hurt conversion rates generally.