http://www.frequentflier.com/blog/and-the-award-for-best-award-seat-availability-goes-to/ I think this survey is a load of horse manure as it doesn't record all seats sold by Aeroplan. They sell plenty both on line and by telephone. Also since Aeroplan is arms length to AC any seats sold by them on other *A carriers are not counted but probably are on other *A carriers. AC has no blackouts but it does have cut offs depending on status for high seasons. If you are not SE and booking for Christmas you could be severely limited as to choice.