Question:

If a tagged data transaction is 7 days old, and I extend it today, it will exist for another 14 days and have a total lifetime of 21 days if no one else extends it. Therefore the "extend" transaction should always be sent as close as possible to the expiration time. Is this correct?



This means if two people happen to extend the same data at the same time, one of their transactions would be "wasted", or could it somehow be cumulative?