The ability to just add manual cards would be so useful for so many reasons, including this one. Version 2 of MaxRewards sort of had this b/c you could take any card and customize it. This was one of the things that made MaxRewards so useful. Now we can’t even edit a card that’s in MaxRewards to correct it when a subcategory or category is wrong. We can edit the %, though I’ve experienced bugs with that, and the label, but not what the category is (changing the label doesn’t change the category in best card).

Making things customizable is the only way to truly meet everyone’s needs.