I recently changed a bunch of my witness votes away from most of the 20% HBD supporters a couple days before they reduced the rate. I can't say the change is because of me, but maybe my actions helped send a signal. I'm no minnow, but I'm not an influencer either.
I have also changed my witness votes based on other behavior I couldn't support on several occasions. Unlike government, Blockchain actions are transparent, and you know the exact power your vote carries. Use that power wisely.
My co-witness votes for 15% interest, we also halped :)