(I altered the labelling for reference purposes)6.2 We may vary these Rewards Program Terms and Conditions from time to time. We will notify you of a change in the following ways:
a. If we change the rate at which all Points in the program are generally earned or converted we will give you 90 days written notice of that change;
b. We will give you 30 days written notice of other changes to these Rewards Program Terms and Conditions;
c. If we change the Point value of individual goods or services in the program to reflect changes in the price charged by our suppliers for those goods or services, or if a particular Reward is unavailable we will notify you on our rewards website at the time you redeem your Reward
I can see them wriggling out of this.
a. They can say that they haven't changed they way that you can earn points and nor have they changed the way they are converted, that is, your expenditure on the card is converted to Citi points. I think that is what is implied, that the conversion is to Citi Points from dollars spent on the card not from Citi Points to Airline Miles.
c. They can say that the price that they are being charged by SQ has changed and that they notify us at the time that the reward is redeemed.
Not nice, but I think they may have covered themselves to give no notice.