This is messed up. I just recently deleted my account (used poweredeletesuite first to edit all my comments to a ".") before finding out about the API stuff. With it deleted, if they've restored my posts, I have literally no way to ever delete any of it again. It's not the end of the world for me fortunately (it could be bad for some people that may have revealed things that are too personal or could get them doxxed), but there were definitely things I'd like to have removed permanently.
This is why I'm not deleting my Reddit account, it's all the "power" we users have over what's going on, they're gonna have to ban me to stop editing my stuff... and then we're gonna do the GDPR dance.