It's already an option on the front end for a user to add registrations and only have one charge on their card; why can't I batch or accumulate 3 or 4 registrations if I only want to charge a card one time?! It's annoying to re-enter card details and it's unsafe for the cardholder for me to have to store that information to keep re-using, and the constituent shouldn't have to have so many individual charges!