So here's the link to the sale. Qatar's website sucks. I stumbled on this link by accident. Shows the discounted fares in J to most of the destinations, but is based on multiple bookings. Cheapest is for 4-5. I was able to price out 4 YYZ-BKK for $2300/pp as abby did (though abby was from YUL).
Rules:
Book by Jan 17
Travel by Dec. 15
Min 7 day stay