I love Autoslash. They just saved me over $100 on a 5 day rental I booked yesterday.
But one question for the resident Autoslash guy: do any of your codes allow for a free additonal driver? I am not talking about the companies that allow a spouse etc. to drive for free or by virtue of your status in a particular company. For example, booking via Costco for all companies they offer allows a free additional driver based on being a Costco member and it can be anyone, not just a spouse. And at another discountxxxxxcarrental site

, their codes give a free additional driver (sometimes more than one), even at Thrifty, who never gives free additional divers, even spouses.
And if some of your codes do have this, is there any way to specify this when requesting a quote or tracking a rental booked elsewhere? You often find me better rates but if I need that extra driver, I can't use them. Even if it is for my spouse and you find me a better rate at Thrifty, I have to stay with the other guys' booking as I need him to be able to drive. If I could specify when submitting a tracking request that it must include a free driver (spouse or other), that would save us both a lot of time. Did all that make sense?