R Shiny.io Performance with Many Users

My app crashed when 50 users tried to use it at once in a live demo. It worked for the first 5 people, then wouldn't load. It never used above 200MB of RAM. Would a paid version of shiny.io help to resolve this issue?

These are the current worker settings:
Max Worker Processes: 1
Max Connections: 50
Worker Load Factor: 5%
Instance Load Factor: 50%
Start Count: 1