I have come across a theoretical problem.
Suppose 'user A' bought 10 coins from Exodus.
After the initial purchase 'user A' creates three simple send transactions for 10 coins to 'user B', 'user C' and 'user D' and relays them over the network. Assuming they all get included in the same block, to whom do the coins go?
Transactions in a block are ordered so it could use the first transaction.
Or the mastercoins could be destroyed in this case.