I came across today one of my own comments on Reddit with a search on duckduckgo. It was still intact. The problem is I used shreddit to randomise and delete the entire contents of my account. My account comments and posts all show empty on my account pages on reddit so there should be nothing.
I did a site:reddit.com search using my username and found ~50 comments that Reddit has undeleted but also hide from my own account. I could still edit and delete them. Its curious that they don’t appear on my accounts content on Reddit and yet a search engine can find them and they are still served by Reddit. Ex Reddit users who deleted their account contents should be aware this is happening and report it as a GDPR breach to their respective agencies if they are in the EU if they too find this has occurred.
Why would comments not show up on your overview but show up on threads they were posted on? How hard can it be to do a SELECT WHERE on a db? Even if you assume things get cropped for performance, eventually the comments should show up in your account overview. I found one today, which just didn’t show up in my account overview, and I deleted EVERYTHING on my account a month ago.
Reddit uses something called listings which contain 1000 items. If you have more than 1000 comments on your account, you will only ever be able to view the last 1000 of them on a page like that. If you delete 50 comments, the listing is now only 950, it does not refill.