For the Citi ThankYou Premier card, the list is more
expansive: «purchases at airlines, hotels, car rental agencies, travel agencies / travel aggregators / tour operators, gas stations, commuter transportation, ferries, commuter railways, subways, taxis / limousines / car services, passenger railways, cruise
lines, bridge and
road tolls, parking lots / garages, campgrounds and trailer parks, timeshares, bus
lines, motor home / recreational vehicle rentals and boat leases and rentals.»