To the last link about the contributor quality score:
"The CQS use different criteria, such as:
Past actions taken on a user’s account or content (within a given time frame) on the account in question as well as on alt accounts
Network and location signals
Steps a user has taken to secure their account (e.g. email verification)"
https://www.reddit.com/r/cqs/comments/1awadej/what_is_contributor_quality_score/
If you make a post on that subreddit you will get an automod message telling you what your score is.