Omg this will really break the whole federated model won't it? It's already insane that different instances hold different vote counts from one another, but this adds a whole new twist on top.

Genuine question: does this mean that PieFed is now no longer ActivityPub compliant? Is it not fully part of the Threadiverse anymore, and is now its own little subset of that? Even Mbin still accepted vote counts, even though it added boosts ("increases" and "reductions" iirc?) on top of them.
Could you tell from your look at the code if PieFed is only throttling its own users internally, prior to votes federating out, or throttling incoming votes from Lemmy as well?
Also this is so ridiculously easy to get around: most of us have a variety of obvious and self-acknowledged alts across the Threadiverse, but I doubt PieFed is going to maintain a mapping among all of them and apply the throttle universally across the entire set. e.g. Blaze goes back to his empire of alts, one for each day of the week, and continues upvoting without restriction.
The KISS principle would seem to apply - why needlessly complicate matters?
Edit: I found your missing vote btw, here it is:

Edit 2: I thought the above image was from Black Hole Sun, but now I am not so sure of that... anyway it seems to fit, regardless:-P.