It could help to clarify exactly what the curation window means. I see some confusion in the comments and I am not completely sure myself how it works if we get down to specifics. Does it currently diminish the curation reward for votes cast within the first 5 min. of a post being posted? And how does that work together with early voters getting a higher curation reward than later voters?
I thought I mostly understood it but thinking about the specifics now I see I'm not really clear on it.
https://peakd.com/curation/@miniature-tiger/an-illustrated-guide-to-curation-from-the-simple-to-the-complex-with-real-examples-from-past-posts-part-1
That is somewhat dated, read 50/50 where it says 75/25.
Voting in the 5 minute window lowers your rewards unless you get big votes behind it, then being early can pay off.