Just an FYI, despite the wording on this, my "don't train on this" checkbox never changes (I don't need to re-toggle it, or change it on every device, etc...). This post reads as if its something that needs to be done repeatedly. Also if you turn on the advanced security option, ChatGPT locks to no training and cannot even be toggled on if you wanted it to.

I don’t use ChatGPT anymore, but when I did, the training opt-out setting was frequently silently resetting itself to off.

This is a good FYI. I guess my microsoft trauma is showing.