Hi,
Yes, you are correct, spouses now incur an additional fee at National. THeir new policy is a little ambiguous. It says additional EC members are free but seems to say only for business purposes.
I wrote National and explained that my DH and I both have EC memberships and asked if I would have to pay if he drove my car. The answer is no. Here is the response, which I plan to print out and bring with me:
"I am in receipt of your email regarding additional driver charges. Yes this
policy has changed but not for Emerald Club members. You do not incur any
additional charges if either of you drive a car that the other has rented."
Bottom line to everyone is It is currently free to join National's Emerald Club. Therefore, even if one spouse will never use EC for any other purpose, I suggest both join. Also, if you are taking any other adult over the age of 25 with you, have them join as well. You never know when someone else will need to take the car.