This rule is complete and total BS and must be dropped immeadiatly.
In the event of a MUST LYNCH situation (i.e. a day where village must lynch a wolf or lose), ONCE YOU HAVE CAST YOUR VOTE YOU MAY NOT UNVOTE OR CHANGE YOUR VOTE TO ANOTHER PERSON. ***YOU ARE LOCKED IN.***
That destroys the entire day. You often use your vote to provoke a response. It's a major part of the strategy. This rule makes absolutely no sense at all.
no mott, you are 100% wrong. this isn't a grind custom rule, this is literally how every single mafia/werewolf game is played, and I have to highlight this every round.
The reason for it is very simple, without it games will come down to wolves needing to have impossible timing.
Before werewolf nerds took their game to the internet, people would play it live all together in a room irl. When a villager misvoted, the final wolves present could bask in their glory of finally tricking the last villager and insta voting and winning the game. that's how the end game was always structured.
that's been extrapolated to the internet, where wolves may not always be around. The game should be about sussing out the truth (or hiding it) through clever debate, putting the pieces together etc, not getting lucky if one wolf isn't around to pile on the wagon to clinch the game.
Without the no-unvote rule, the last (and what should be one of the most exciting points of the game) will usually end up with everyone twiddling their thumbs until the last 5 minutes. A lot of the times it will come down to vote sniping. One villager voting at :59 then a wolf votes :59 and then the :59 villager unvotes to revote for the now clear wolves at :00 or something lame like that. At that point, the village isn't really solving the game through debate and reason or through any mental acuity, but by simple game mechanics. For all intents and purposes they were fooled and owned through the whole game but because one wolf has a slow internet connection it gives the game to the villagers.
no unvote rules at must lynch make the game more exciting and less susceptible to simple game mechanics. people can still debate and argue to their hearts content, but once the vote goes in, it's locked. this is only for must lynch situations though.