Clover website says third party apps are not allowed implement the feature but searching the app market turns up a bunch of third party apps provide that very feature.
Does that mean Clover has some program that authorizes selected third parties that permission (maybe for some fee)? How can we sign up for that program?
Here's what Clover has on its website: https://docs.clover.com/docs/credit-card-surcharging-policy?utm_source=ISVs+09%2F04%2F2020&utm_campaign=f4b02f9ea9-EMAIL_CAMPAIGN_2020_09_08_03_58_COPY_13&utm_medium=email&utm_term=0_00da381eeb-f4b02f9ea9-117606005
Here's an example for app that provides that surge charge feature: