Why not just make it not purchasable with that payment option/store credit? In many countries Steam supports plenty of alternative payment options that do not

Why not just make it not purchasable with that payment option/store credit? In many countries Steam supports plenty of alternative payment options that do not use VISA or mastercard. Thinking about it, if a platform as enormous as Steam just completely stopped accepting VISA and mastercard, they'd a) probably still be fine b) VISA and mastercard would probably cave - few companies will prioritize outworn politics over literally billions of revenue. In fact I'd expect these two to be the last to do that. Valve would be more the type to put principles first. Too bad they didn't this time.