My response was not targeted towards Open-AI but towards all closed-source AI companies where your data is used for training and/or is visible to the internal agents whether you want it to or not.
API / enterprise subs tier is default opt out of training. Personal subsidized tier is default opt in with the option to to opt out.
I don't see a grand conspiracy beyond this.
Seems it doesn't matter if you opt out or in.. your data will be used for training