This may have mentioned last month but the threads seem to go back only a couple of weeks. On the TG Web site they are now offering "last minute" fares (Super Deals). Most are one-way and you must travel on a specific day and flight number, paying by credit card (and the cardholder must travel). However BKK-SIN on 13 May, returning 15 May is 3990 baht, you can get a one-way to London on 15 May for 9990 baht and a one-way to Sydney on the same day for 6990. I'm guessing these will be fares with a 50% mileage accrual, however

The dates range from tomorrow to tomorrow + 2 so definitely "last minute"