

There’s a non-malicious reason for this - if you used a script based on interacting with the website, when subreddits went hidden, it actually hidden your own comments from you. So they aren’t visible to automated scripts and then when subreddits go visible again, suddenly it looks like comments “came back”.
No, because what he’s describing is a self-run comment editing and deleting script.
GDPR account deletion works very differently.
Note I’m not defending Reddit here, as much as anything it’s advice for anyone (like me) who has to go back and re-run the script every few months because of those brave people whose form of protest is very temporarily inconveniencing themselves.