I didn't want to get into this, but I was linked this thread once again, so here I am. I didn't want to give any of you a hard time (but honestly, do you care what a random idiot says on an Internet forum?)
First, none of your 4 e-mails (8 in my case, each for Minecraft and Gamepedia) stated that any data would be erased. Just that one would lose access to his account. The titles were also great: "❗FINAL NOTICE: Consent Required for Uninterrupted Service❗"
Any person would care about his account, but not your "service interruptions". I myself didn't do anything until the very last e-mail. Was it so hard to mention an account transfer in the subject field?
1/3rd of a healthy forum just vanished over night - Yahoo would have be proud of such effort, they have a long history of closing down and deleting everything left and right. Nobody could have thought it would only take 3-4 weeks, since acquisition became public, to finish the "transfer". The admins did a good job. (hm... probably without sarcasm this time)
(1) ‘personal data’ means any information relating to an identified or identifiable natural person (‘data subject’); an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person;
(2) ‘processing’ means any operation or set of operations which is performed on personal data or on sets of personal data, whether or not by automated means, such as collection, recording, organisation, structuring, storage, adaptation or alteration, retrieval, consultation, use, disclosure by transmission, dissemination or otherwise making available, alignment or combination, restriction, erasure or destruction;
(23) ‘cross-border processing’ means either:
(a) processing of personal data which takes place in the context of the activities of establishments in more than one Member State of a controller or processor in the Union where the controller or processor is established in more than one Member State; or
(b) processing of personal data which takes place in the context of the activities of a single establishment of a controller or processor in the Union but which substantially affects or is likely to substantially affect data subjects in more than one Member State.
If the public forum posts were personal data, every page hit outside the EU would have been a violation of GDPR. Backups in different Data Centres would also be a violation of 23a. to my understanding.
By the way, what did Steam do to profiles when they updated for GDPR? They introduced more privacy settings to profiles, and DEFAULTED the new "my game list" option to FRIENDS-ONLY, so it wouldn't be public by default for anyone.
A neat side-effect was that they locked out SteamSpy with that move.
What makes me actually sad, is that no one cared enough to escalate/communicate it earlier to try and avoid it.
I only hope that you'll figure it out and restore the published content.
42nd post. I'm out.