I just checked my profile page and was wondering quite a bit that my approximate impact dropped from 97k to 55k. How is this possible if none of the posts have been deleted?
That is indeed surprising behavior! I just learned about the formula in researching your question. Based on the algorithm at What happened to the other people? My Impact (people reached) just dropped, namely:
That's how we got to the current method, which counts views on the following:
Answers - Views of the parent question for answers that are:
- Non-deleted AND
- Score > 0 AND
- Also meets one or more of the following criteria:
- In the top 3 answers OR
- Is the Accepted Answer OR
- Score >= 5 OR
- Has at least 20% of the total vote count
I think what happened was that this answer of yours to a highly-viewed question (41,499 views as of today) fell off the "top 3 answers" list when this other answer got an upvote from 1 to 2 on 2019-07-19, taking 3rd place for itself from what was previously a five-way tie for 3rd. That de-listing of your answer from a ~42k view question seems to account for your "missing" impact numbers.