The best part of the fediverse is that anyone can run their own server. The downside of this is that anyone can easily create hordes of fake accounts, as I will now demonstrate.
Fighting fake accounts is hard and most implementations do not currently have an effective way of filtering out fake accounts. I’m sure that the developers will step in if this becomes a bigger problem. Until then, remember that votes are just a number.
Tallies are maintained in the db in real-time. No calculating needed
I just mean that the karma system ala Reddit did more than just keep track of it and display it afaik. The data is in the db but a fully done karma system it is not. I could be wrong.