I'd say "my mom/sister/dad/cousin" is not going to host this themselves is a tricky assumption. I can imagine a world where my mom creates an account with a ser

I'd say "my mom/sister/dad/cousin" is not going to host this themselves is a tricky assumption. I can imagine a world where my mom creates an account with a service that kicks off an EC2 instance on her behalf without her even knowing it. Want to build a facebook that scales cheaply? Make every user bring their own server. On top of that, make "bringing a server" as easy as a registration process.