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My seldom-updated personal site is http://adamierymenko.com/

It's actually worse than doubling. The nature of distributed systems means that participating in resources consumed normally triples resource consumption at least. I'm not aware of any approach to decentralization of services like Facebook, Twitter, etc. that would merely double it.

Your typical desktop or laptop has a lot of resources to spare. Your typical mobile device has none. Mobile promotes a client/server mainframe/dumb-term architecture for fundamental technical reasons.