Earn 1 Air Canada flight credit with a value of $20 CAD (for round-trip bookings) or $10 CAD (for one-way bookings) (each a “Flight Credit”), for every 10 Uber rides (excluding UberPool) taken in Canada and the United States. Uber rides will only count towards the total as long as the Aeroplan Account and Uber accounts are linked. The value of the Flight Credit discount applies to each passenger on the booking. Flight Credits cannot be used for multi-city trips or Aeroplan flight rewards and cannot be combined with any other promotion, coupon, flight credit or voucher whether issued by Air Canada or any third party. Limit of 1 Flight Credit per booking.
I bolded the part that I'm really interested in.