No worries, I'm not offended ;)

This post was more an experimentation / proof-of-concept. While it doesn't scale well, it was definitely fun to setup.
For synk, keep in mind that's it's still a work in progress. As the only user, I could test much cases, so I wouldn't want to be responsible for loosing your 10Tb of data!
synk uses ssh + rsync as a back end. You could use it for incremental backups without much issues I think. I'd be glad to have another user!

Quick question though. Do you plan on hosting the backups yourself, or rely on some sort of service for that?