Clueless CSRs. Also, when calling in, some people were able to renew weeks earlier with this offer and some were denied.
Also last year a person said his secondary membership did not get the free and discounted oil change and car wash coupons. YMMV. So he cancelled and bought 2 separate Gold Plans instead. But they were only $50 each last year.
I updated the OP with the cost for the Secondary Membership.