If a case battle ties, the winnings will be split based on the total number of winners. There is no tiebreaker; winnings are always split.
For example, if three people pull the same amount in a battle, the winnings will be split between all three.
What about in Crazy Mode battles?
In a tie in a Crazy Mode battle, the person(s) who pulled the least amount wins. If two people pull the least amount, the winnings will be split between those two.
What about in Group Mode battles?
Group Mode battles are already split between all players in the battle, so a tie will never occur.