Bite their hand off!
Only a figure of speak - of course you wouldn’t bite any ones hand off but you have heard the expression no doubt. Think of car coupons as one such thing you must absolutely look out for and use the next time you need to hire a car for any purpose; a business trip, a holiday, a family outing and your car is too small.
Car rental companies have to advertise and that advert is only any good if it prompts someone to pick up the phone or book online whatever. Simply the rental car coupons are a way of tempting you to book, before it is too late etc and why not if you are to save money!!