Permit all patrons to save credit card information without the necessity of making a purchase.
This idea was previously labeled as "already exists" by RSA Support. It both does and does not (refer to the RSA Support response below). All users who create an account should have the ability to save their credit card information during sign-up or at any other time (e.g., via My Account > My Settings). We should be able to identify attendees who have not stored a credit card and send them a reminder to do so, including guests and those at tables, not just those who purchased tickets directly. This would enable us to avoid collecting credit card information at check-in, except for a few exceptions, which is a significant hassle during the process.

Thus, there are three interconnected concepts. Website: option for patrons to add stored credit cards (even when not making an immediate purchase) both during account setup and later through Account Settings; Reporting: the capability to view attendees who have or have not saved credit card information, and Communications: sending them a reminder via email to complete this action.

Response from RSA Support to the original poster:
I appreciate this idea. There are three distinct methods for storing a credit card within readysetauction. Two of them can be purchased without the need for a patron.

To require a credit card for bidding, navigate to: Admin > Event Settings > Event Website > Select the option that states “Require a stored credit card for eBidding.”

To enter the credit card at check-in, please navigate to: @Event > Check In Guest

Patrons have the option to make a purchase on the event website and can choose to save their credit card information for future transactions.
Drift Boss