Hey Ben,
Thanks for reaching out! Our ticketing plugins themselves don’t provide “discount” functionality—this comes from the eCommerce platform you’re using with our plugins.
So if you’re using WooCommerce, for example, then you would use WooCommerce’s own coupon code/discount features, which you can read more about here ? https://docs.woocommerce.com/document/coupon-management/
There is no way to make a “buy x tickets, get y discount” coupon code with our plugins out-of-the-box — you would need to tinker with WooCommerce or even possibly use a WooCommerce Extension that would allow for more advanced coupons. But with WooCommerce out-of-the-box, for example, you can set a “Minimum spend” value for a given coupon code to work; so if tickets are $20 apiece, and you only want a discount code to work for folks buying four or more tickets, you can set the minimum spend value for that discount code to $80 and thus basically pull off the sort of discount you describe.
I hope this information helps!
George