Should I add "Accepts 0-conf" as a field for merchants on GreenPages.cash? Or would that just be too much clutter, because not enough people care about that just yet?
You should simply not list any merchant who does not accept zero conf as it is a bad user experience.
Unfortunately, that would be more than most merchants at the moment. Also unfair to those business for whom it is simply unsafe to accept 0-conf due to item value.