Gotta disagree with the 100+ a day thing, volume isn't really what kills accounts.
I've run Reddit for OF models for about 4 years. I've got accounts pushing 240+ posts in a day and they're completely fine, comments and replies on top, and most last well past a year. One's been going around 18 months straight, still alive, tens of thousands of posts on it. The ones that stop, we usually pulled ourselves, Reddit didn't kill them.
The one condition that actually matters is that every post strictly fits the sub's topic and rules. That's the whole game. Posting is automated on my end but the content is all prepped by hand and sorted by category first, so it still reads human. Burners die fast because they dump the same recycled stuff with copy paste titles into the wrong subs and never comment. That's what gets flagged, not the post count.
It is also important to publish content in strict accordance with the rules of each subreddit.