I was able to successfully request a product change from my wife's Rewards+ to Custom Cash via live chat. Summary:
LOSE 2 TIMES EARN AT GAS STATIONS Purchases for Gas Stations and Supermarkets, for the 1st $6,000 per year. LOSE 2 TIMES EARN AT SUPERMARKETS Purchases for Gas Stations and Supermarkets, for the 1st $6,000 per year.
LOSE DAMAGE & THEFT PROTECTION
LOSE EXTENDED WARRANTY
LOSE POINTS TRANSFER For Select Airlines. LOSE ROUND UP FEATURE
Well worth giving up those benefits in exchange for:
Enjoy benefits such as: 5 ThankYou Points for each $1 you spend in your highest spend category each billing cycle up to the first $500 spent in that category. Categories: Restaurants, gas stations, grocery stores, select travel, select transit, select streaming services, drugstores, home improvement stores, fitness clubs, live entertainment.