Kate's take, in a sentence or two

Kate says there's no formal discount, but every course purchase includes a $250 coupon toward MBA in the course portal—though almost no one actually uses it. Otherwise, no discounts are given since MBA is already heavily discounted compared to buying everything a la carte (over $7,000 versus $24.97), except that she and Rachel have an internal, fairly high spending threshold where they'll informally apply past purchases toward MBA's cost for major repeat buyers.