We'd like to develop a sliding-scale program from crowd-sourced funds using our Square terminals. Ideally, this would be a pop-up screen after the "tips" screen which would show options such as: "I would to help others access services by giving: a) $1, b) $5, c) custom amount, d) not at this time." If the customer opted to make a donation, it would be nice to have a "Thank you for your generosity!" message pop up at the close of the transaction. Is there a way to do any of this?
