To clarify, the rules for OTU points are per UY. However, you are entitled to the benefit of BOGO under MMB per calendar year.
That’s why it gets a little confusing. I bought OTU points in my June 2025 UY using the BOGO benefit.
I can still buy OTU points in my Aug or Dec 2025 UY, but I will pay full price for those if I wanted to buy them before Dec 31st, 2025.
To get the benefit of BOGO in one of those UYs, I have to wait to buy them until January 1st, 2026 when my 2026 benefits kick in.