Hello Emma,
Awesome question. I’m afraid that Event Tickets Plus will not handle that sort of functionality right out of the box. However, I have heard that those using WooCommerce for taking orders have had some luck with discounts using the Dynamic Pricing extension. I haven’t personally tested it out, but we do offer a full refund within 30-days of purchase, so you could always return Event Tickets Plus if it doesn’t integrate with WooCommerce and Dynamic Pricing the way you would hope.
Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff