Here's my strategy to growing Reddit accounts from scratch, using Dolphin + Chrome + residential proxies:
1. On a new Anti-detect profile, I would just browse random websites and accept various cookies. Like Facebook, Youtube, X, Google, etc.
2. Google up something + Reddit (ie Iphone 16 reddit). Then click on a Reddit page.
3. Scroll to any post and try to upvote or comment. This will trigger a registeration.
4. Register using even temp-mail works for some reason. Or Gmail to be safe but I'm not going to bother buying proxy phone numbers lol.
5. Subscribe and browse and upvote random posts on popular subreddits.
6. Make ONE and only 1 comment on any subreddit that you can gain karma off of. Make sure the subreddit you choose has no CQS (contribute quality score) requirement.
7. Keep browsing and upvoting random posts. Don't need to spend hours on this. Only a few mins will work.
8. Every 24 hours, make 1 comment, until the account is at least 5-7 days old (7 to be safe). Seems like commenting more than once per day triggers Reddit's algorithm early on. Posting is probably out of question because that may trigger their shadowban too. You can also browse/upvote random posts/comments but doesn't have to be that frequent.
9. On day 7, you can ramp this up to every 12 hours or even more frequent. You might be able to post too. I wouldn't mind taking the risk at this point because if the account is still on Reddit's anti-spam radar, chances are, it won't leave their radar anytime soon.
Now I'm not sure when your account is fully Reddit-proof of anti-spam filters so you'll have to experiment. I grew lots of accounts this way, though my accounts aren't used for OFM. My use case is mostly for upvoting personal posts/comments.