The combination of one minute block time and minimum transaction fees were designed with speed and security in mind. The ample block height allows for scaling as network transaction volume increases. Collectively, these specifications prevent malicious actors from flooding the network with fake transactions, as has happened lately bringing Bitcoin transactions to a crawl (Gautham, 2016). Bad actors can still try to fill large blocks with multiple small transactions, but they will waste their time and money. The masternodes will collect large fees from their failed efforts.