When I read this
thread, I thought: if someone creates a thread and after a few minutes changes its entire content, ninjastic.space will stop keeping this historical record. This could be a strategy to create a scheme for those who want to do something wrong and be difficult to detect.
People already do scenario you describe, AFAIK usually it's used to make detecting multi account harder.
I remember you saying a while ago that you would scrape posts multiple times. Will you always do this, ensuring that every so often it checks for changes, even if a post is several days, weeks, or months old?
Perhaps this is a waste of resources that is not very useful, because we know that fortunately most posts are not edited very late.
I'm also curious about it. Total thread will grow over time, so i doubt it's possible or practical without strict criteria which thread/post should be re-scraped.