Indeed you are correct. AARP always used to be 15% and the Sixty Plus sometimes was as high as 20% off. The web site now says the "Senior Traveler" rate is only 10% off, but the ads for the Little League and LPGA rates still claim "up to 15%".
First a bad promo and now a reduction in my favorite discounts. I am feeling unloved by Choice, might explain why I haven't had a stay with them in months.