Perhaps it is related to meta.stackexchange.com/q/337298.

To find the question an answer belongs, use the question by answer ids method (find question_id). To find a post where a comment belongs, use the comment by ids method (find post_id).

github.com/soscripted/sox/blob/dev/sox.features.js#L680-L737

However, SEDE doesn't have all features SE API has. E.g. it doesn't provide information on bounties, del/cv counts, etc., right? I guess I will have to work with the API.

That makes sense, but what about a filter option which can't be searched in advanced search? Like delete vote count or up/downvote count? That'd need to fetch all questions needed and sort them.

@BrockAdams I want to search questions where their recent activity is between {date} and {date}. We are talking about ~70k questions. With pagesize 100, this would take only 700 calls > 700 quota. With a key, I won't have any problem.

The problem is exactly that - I need real-time data, so I need to use the API. I will take a look at the paging, anyway.