Good points. I already have three methods. This would be one more, in the extremely unlikely event that all the others fail. A fourth backup would be overkill if it wasn't free.
I see the reasoning, but I can't help thinking that any event that would disable two or three well-planned backups is also rather likely to disable the fourth - especially if that one comes with no guarantees. I'm thinking that in the event of a major natural cataclysm, societal upheaval, etc, tarbackup.com is not going to be foremost on nanch's mind.
I think this service could be most useful for spreading out the risk. For a user outside North America with a backup drive in their house and another backup somewhere else on their continent, adding an extra one in the U.S. might make sense. If your backups are already on S3 in Oregon it's probably realistically less useful.
Good points again. I try not to underestimate poor planning on my part. My tertiary backup is an email attachment to myself. Someone might hack my account to make it inaccessible.
It's interesting to me that people depend on tarsnap, when it could become inaccessible if something happens to the author. Maybe tarbackup is better since at least it's free.
