One is circumstance and the other is a strict sequence of events. There is absolutely no chance that I can get a discount in my first ever hotel booking on the site I'm using. I can only get it on my next ones (read second and subsequent) once the first payment has been finalized. I can't get someone else's discount because it's account based, I can't get a coupon from a magazine or any other way. There is no possible scenario where first = next because the system is strictly enforced. There is no mistaking or any hope that I will get the discount on my first ever payment and I never thought otherwise when I first saw the advertisement.
No, it's not beside the point. I know of pizzerias that don't even ask you for coupons anymore and give you the discount anyway, while their online delivery prices are the same as the coupon discounted ones. It's not a good example to define the word "next" and it's not enforced in any shape or form unlike the previous example of booking. Or at least it's not a good example to be used against my argument, because I argue for a tightly regulated system, not a pizzeria's marketing move that doesn't have any actual rules. I admit that it can happen due to circumstance. In the same vein I can hold on to my coupon and use it on my tenth purchase. Is next = tenth now? Also how exactly does Dominos have your mail to send you these coupons in the first place.