I should have clarified what X and Y mean in this instance. They do not correspond to individual software features but rather the set of expectations that both

I should have clarified what X and Y mean in this instance. They do not correspond to individual software features but rather the set of expectations that both parties have agreed to beforehand with regards to privacy, access, security, and overall functionality. Every site has terms of use that basically say "you agree to the condition that we can change anything anytime and you cannot do anything about it." So as far as I am concerned as a user, X stands for the entire site experience regardless of the terms or privacy policy. I don't care that your 45 page document said you can add Y anytime. If Y was not there when I signed up and it affects my security, privacy, or accessibilty in a way that I value, you should tell me about it before you opt me in. Personally, you would be the last person I would think of as pulling such shenanigans. Your work and words have shown that you care about your users more than making some extra cents in the short-term. I can't say I feel the same about others.