The 'extractor.reddit.morecomments' option enables the use of the '/api/morechildren' API endpoint (1) to load even more comments than the usual submission-request provides. Possible values are the booleans 'true' and 'false' (default). Note: this feature comes at the cost of 1 extra API call towards the rate limit for every 100 extra comments. (1) https://www.reddit.com/dev/api/#GET_api_morechildren