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Almost certainly true. Historically, you’d just grab the dumps from pushshift.
https://www.reddit.com/r/modnews/comments/134tjpe/reddit_data_api_update_changes_to_pushshift_access/
“TL;DR: Pushshift is in violation of our Data API Terms and has been unresponsive despite multiple outreach attempts on multiple platforms, and has not addressed their violations. Because of this, we are turning off Pushshift’s access to Reddit’s Data API, starting today”