Hi Richard,
Thanks for reaching out! As Eventbrite Tickets imports events from Eventbrite by event ID and not by URL, I’m afraid that support for Eventbrite affiliates is not available at this time. The best workable approach at present would be to import your events from Eventbrite via event ID, then use a custom code snippet to replace the ticket form on your event pages with your Eventbrite affiliate URL. We’d be glad to provide a snippet to get you started, if this is an option you might be interested in exploring!
Let me know if you should have any other questions or concerns here. Cheers, and thanks again!