Air Macau extends campaign of "buy 1 get 1". Fuel surcharge and taxes will also be exempted.
(マカオ航空、2名同時予約で1名無料のキャンペーン延長 燃油や諸税も無料に)
https://www.traicy.com/posts/20231007280548/
(Summary)
Air Macau extends campaign of "buy 1 get 1". Fuel surcharge and taxes will also be exempted. The air routes which applies this system will be Macau-Tokyo, and Macau-Osaka.
(Summary ends)
I don't have a chance to use this discounted tickets. But, I'd recommend people in Japan to use this campaign.