I still don't see any arguments against the solution where organizers could choose the limit of votes themself. I would be happy with this solution, organizers would get an option to go from this median system, you could implement a warning for participants. As you said this problem is not easy to solve but seems to me that you've chosen an easy to implement, scalable solution, which is fine, just give people the option to not use it and avoid some problems that it creates. Put the responsibility on organizers, because a generalized solution will never fit everyone perfectly. We can talk all day about all the edge cases of each approach, but I think I explained all my arguments, as well as you. So, I hope you will decide what's best, I just wanted to explain my concerns, because this thing sort of ruined the jam for me in a way. Of course, I will try to have as many ratings as possible in the future. I just really think there's room for some easy improvement for everyone.
Thank you!