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if you go to delete your comments remember to overwrite them first

because reddit don't actually delete anything (plainly visible in GDPR dump)

Honestly your Reddit comment was probably already archived on Pushshift as soon as you posted it.

hosted by one guy?

a single letter from a solicitor to his hosting would probably shut that down

Pushshift has been around for about a decade now and has dealt with its fare share of deletion requests.

That's why we need more second-tier archive mirrors. Redundancy is important.