Thankfully Chase does not get to decide when discrimination is convenient for them or not. They have the option not to business with Visa and or United. Tough decisions but that is the world we live in. Or let them know because of the circumstances that it is discriminatory. It is their choice but in 2017/2018 any form of discrimination does not age well.
Chase/United should just make accomodations for things like this as it makes 100% sense and the results far outweigh the costs.