The flag was not personal, it had nothing to do with your content.
It came from following the xaccounts on hive.vote.

The top 20 accounts take 50% of the rewards available each day.
https://peakd.com/thehive/@antisocialist/the-daily-meme-372

Everybody with less than 1000mv should be downvoting what they take, imo.
Following the x accounts makes that easy for non-coders.

The downvote you got is very small, you can ignore it.

Tipu is a vote selling service.
You can tip people for free.