Earlier quoted context omitted.
"and you're more likely to have a good comment downvoted." This has never made sense to me. On some subreddits that focus on disciplines (like AskHistorians among many others), you can easily get downvoted (ie "dissapeared") just by asking a question, let alone answering one. Other times you'll won't get upvoted nor downvoted when you've actually contributed to the discussion. In these instances I lurk even when I ca…
Reddit's voting system has two issues: (1) Lots of strategic downvoting. That's why no thread stays above 75%. It happens to comments as well as threads. Some of it is spammers trying to improve their own ranking, and some is probably just trolls. (2) "Stalker" downvoting, which is when a person retaliates to a comment by downvoting that person's contributions en masse . I wonder if they've put any machine learning m…
As to the ops questions: you should look into creating a list of subreddits that cover these things you're interested in.