That's where the whole dispute is. Citi has different interpretation of points "earned or converted", and they kept on saying it refers to the direct QFF earn card. So the new T&C, which subtlety sneaked in after this whole incidence, specifically relate to "point transfer". So the wording is very clear this time.
When you are about to transfer your point, there is a box that says "I agree with the terms and conditions" which you need to tick before you can transfer your points. Click on the highlighted "Terms and Condition" then you will see the added T&C which clearly stated they can change the rules at any time with or without notice. So if you tick it, you have agreed to the T&C. If they devalue again without telling us, legally you can't complain as you have agreed to it, even though the T&C was changed and you didn't read it. It is all there!