When the Marketing app is installed, there are some out-of-box configurations - like On24 for webinar integration. This request is to add a few Payment Gateways that are configured out-of-box. I would recommend the most popular like Paypal, Venmo, CashApp. https://docs.microsoft.com/en-us/dynamics365/customer-engagement/marketing/event-payment-gateway Bottom line - it should be easier to enable payment for event registration.