Statements that are repeated by a lot of people, especially if billions of people participate, should be stored once, and linked to all the people who said the same thing. This will greatly reduce the amount of data that needs to be stored.
The point has already been made. This will greatly reduce the amount of data that needs to be stored.
It's ok to store copies of data on local devices to prevent accidental loss of the data, and to reduce retrieval times if the same data is retrieved repeatedly.
This content is created by the open source Your Priorities citizen engagement platform designed by the non profit Citizens Foundation